diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index 937dd0a565..48984f6d82 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -39,6 +39,8 @@ class Worker
 
 	const FAST_COMMANDS = ['APDelivery', 'Delivery', 'CreateShadowEntry'];
 
+	const LOCK_PROCESS = 'worker_process';
+	const LOCK_WORKER = 'worker';
 
 	private static $up_start;
 	private static $db_duration = 0;
@@ -125,9 +127,9 @@ class Worker
 				}
 
 				// Trying to fetch new processes - but only once when successful
-				if (!$refetched && DI::lock()->acquire('worker_process', 0)) {
+				if (!$refetched && DI::lock()->acquire(self::LOCK_PROCESS, 0)) {
 					self::findWorkerProcesses();
-					DI::lock()->release('worker_process');
+					DI::lock()->release(self::LOCK_PROCESS);
 					self::$state = self::STATE_REFETCH;
 					$refetched = true;
 				} else {
@@ -139,21 +141,21 @@ class Worker
 			if (!self::getWaitingJobForPID()) {
 				self::$state = self::STATE_LONG_LOOP;
 
-				if (DI::lock()->acquire('worker', 0)) {
+				if (DI::lock()->acquire(self::LOCK_WORKER, 0)) {
 				// Count active workers and compare them with a maximum value that depends on the load
 					if (self::tooMuchWorkers()) {
 						Logger::info('Active worker limit reached, quitting.');
-						DI::lock()->release('worker');
+						DI::lock()->release(self::LOCK_WORKER);
 						return;
 					}
 
 					// Check free memory
 					if (DI::process()->isMinMemoryReached()) {
 						Logger::info('Memory limit reached, quitting.');
-						DI::lock()->release('worker');
+						DI::lock()->release(self::LOCK_WORKER);
 						return;
 					}
-					DI::lock()->release('worker');
+					DI::lock()->release(self::LOCK_WORKER);
 				}
 			}
 
@@ -949,14 +951,14 @@ class Worker
 		}
 
 		$stamp = (float)microtime(true);
-		if (!DI::lock()->acquire('worker_process')) {
+		if (!DI::lock()->acquire(self::LOCK_PROCESS)) {
 			return false;
 		}
 		self::$lock_duration += (microtime(true) - $stamp);
 
 		$found = self::findWorkerProcesses();
 
-		DI::lock()->release('worker_process');
+		DI::lock()->release(self::LOCK_PROCESS);
 
 		if ($found) {
 			$stamp = (float)microtime(true);
@@ -1194,13 +1196,13 @@ class Worker
 		}
 
 		// If there is a lock then we don't have to check for too much worker
-		if (!DI::lock()->acquire('worker', 0)) {
+		if (!DI::lock()->acquire(self::LOCK_WORKER, 0)) {
 			return $added;
 		}
 
 		// If there are already enough workers running, don't fork another one
 		$quit = self::tooMuchWorkers();
-		DI::lock()->release('worker');
+		DI::lock()->release(self::LOCK_WORKER);
 
 		if ($quit) {
 			return $added;
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index d8c479531d..c8d7152143 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -251,7 +251,7 @@ class Contact
 		$updated = max($contact['success_update'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 		if ((($updated < DateTimeFormat::utc('now -7 days')) || empty($contact['avatar'])) &&
 			in_array($contact['network'], Protocol::FEDERATED)) {
-			Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id'], ($uid == 0 ? 'force' : ''));
+			Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 		}
 
 		// Remove the internal fields
@@ -409,7 +409,7 @@ class Contact
 		}
 
 		// Update the existing contact
-		self::updateFromProbe($contact['id'], '', true);
+		self::updateFromProbe($contact['id']);
 
 		// And fetch the result
 		$contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
@@ -1249,9 +1249,9 @@ class Contact
 
 		if ($background_update && !$probed && in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
 			// Update in the background when we fetched the data solely from the database
-			Worker::add(PRIORITY_MEDIUM, "UpdateContact", $contact_id, ($uid == 0 ? 'force' : ''));
+			Worker::add(PRIORITY_MEDIUM, "UpdateContact", $contact_id);
 		} elseif (!empty($data['network'])) {
-			self::updateFromProbeArray($contact_id, $data, false);
+			self::updateFromProbeArray($contact_id, $data);
 		} else {
 			Logger::info('Invalid data', ['url' => $url, 'data' => $data]);
 		}
@@ -1814,31 +1814,29 @@ class Contact
 	/**
 	 * @param integer $id      contact id
 	 * @param string  $network Optional network we are probing for
-	 * @param boolean $force   Optional forcing of network probing (otherwise we use the cached data)
 	 * @return boolean
 	 * @throws HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function updateFromProbe(int $id, string $network = '', bool $force = false)
+	public static function updateFromProbe(int $id, string $network = '')
 	{
 		$contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
 		if (!DBA::isResult($contact)) {
 			return false;
 		}
 
-		$ret = Probe::uri($contact['url'], $network, $contact['uid'], !$force);
-		return self::updateFromProbeArray($id, $ret, $force);
+		$ret = Probe::uri($contact['url'], $network, $contact['uid']);
+		return self::updateFromProbeArray($id, $ret);
 	}
 
 	/**
 	 * @param integer $id      contact id
 	 * @param array   $ret     Probed data
-	 * @param boolean $force   Optional forcing of network probing (otherwise we use the cached data)
 	 * @return boolean
 	 * @throws HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function updateFromProbeArray(int $id, array $ret, bool $force = false)
+	private static function updateFromProbeArray(int $id, array $ret)
 	{
 		/*
 		  Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
@@ -1878,7 +1876,7 @@ class Contact
 
 		// If Probe::uri fails the network code will be different ("feed" or "unkn")
 		if (in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]) && ($ret['network'] != $contact['network'])) {
-			if ($force && ($uid == 0)) {
+			if ($uid == 0) {
 				self::updateContact($id, $uid, $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
 			}
 			return false;
@@ -1933,7 +1931,7 @@ class Contact
 		}
 
 		if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
-			self::updateAvatar($id, $ret['photo'], $update || $force);
+			self::updateAvatar($id, $ret['photo'], $update);
 		}
 
 		if (!$update) {
@@ -1941,7 +1939,10 @@ class Contact
 
 			// Update the public contact
 			if ($uid != 0) {
-				self::updateFromProbeByURL($ret['url']);
+				$contact = self::getByURL($ret['url'], false, ['id']);
+				if (!empty($contact['id'])) {
+					self::updateFromProbeArray($contact['id'], $ret);
+				}
 			}
 
 			return true;
@@ -1963,7 +1964,7 @@ class Contact
 			$ret['name-date'] = $updated;
 		}
 
-		if ($force && ($uid == 0)) {
+		if ($uid == 0) {
 			$ret['last-update'] = $updated;
 			$ret['success_update'] = $updated;
 			$ret['failed'] = false;
@@ -1976,7 +1977,13 @@ class Contact
 		return true;
 	}
 
-	public static function updateFromProbeByURL($url, $force = false)
+	/**
+	 * @param integer $url contact url
+	 * @return integer Contact id
+	 * @throws HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public static function updateFromProbeByURL($url)
 	{
 		$id = self::getIdForURL($url);
 
@@ -1984,7 +1991,7 @@ class Contact
 			return $id;
 		}
 
-		self::updateFromProbe($id, '', $force);
+		self::updateFromProbe($id);
 
 		return $id;
 	}
@@ -2080,7 +2087,7 @@ class Contact
 		if (!empty($arr['contact']['name'])) {
 			$ret = $arr['contact'];
 		} else {
-			$ret = Probe::uri($url, $network, $user['uid'], false);
+			$ret = Probe::uri($url, $network, $user['uid']);
 		}
 
 		if (($network != '') && ($ret['network'] != $network)) {
@@ -2371,7 +2378,7 @@ class Contact
 			}
 
 			// Ensure to always have the correct network type, independent from the connection request method
-			self::updateFromProbe($contact['id'], '', true);
+			self::updateFromProbe($contact['id']);
 
 			return true;
 		} else {
@@ -2400,7 +2407,7 @@ class Contact
 			$contact_id = DBA::lastInsertId();
 
 			// Ensure to always have the correct network type, independent from the connection request method
-			self::updateFromProbe($contact_id, '', true);
+			self::updateFromProbe($contact_id);
 
 			self::updateAvatar($contact_id, $photo, true);
 
diff --git a/src/Module/Debug/Probe.php b/src/Module/Debug/Probe.php
index 0d1c3282b2..48838cc8bb 100644
--- a/src/Module/Debug/Probe.php
+++ b/src/Module/Debug/Probe.php
@@ -44,7 +44,7 @@ class Probe extends BaseModule
 		$res  = '';
 
 		if (!empty($addr)) {
-			$res = NetworkProbe::uri($addr, '', 0, false);
+			$res = NetworkProbe::uri($addr, '', 0);
 			$res = print_r($res, true);
 		}
 
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index c4f4e57f29..c841b9ce46 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -328,16 +328,8 @@ class Probe
 	 * @throws HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function uri($uri, $network = '', $uid = -1, $cache = true)
+	public static function uri($uri, $network = '', $uid = -1)
 	{
-		$cachekey = 'Probe::uri:' . $network . ':' . $uri;
-		if ($cache) {
-			$result = DI::cache()->get($cachekey);
-			if (!is_null($result)) {
-				return $result;
-			}
-		}
-
 		if ($uid == -1) {
 			$uid = local_user();
 		}
@@ -408,14 +400,7 @@ class Probe
 			$data['hide'] = self::getHideStatus($data['url']);
 		}
 
-		$data = self::rearrangeData($data);
-
-		// Only store into the cache if the value seems to be valid
-		if (!in_array($data['network'], [Protocol::PHANTOM, Protocol::MAIL])) {
-			DI::cache()->set($cachekey, $data, Duration::DAY);
-		}
-
-		return $data;
+		return self::rearrangeData($data);
 	}
 
 
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 7c40105e20..037c2e849a 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -822,7 +822,7 @@ class Processor
 		}
 
 		Logger::info('Updating profile', ['object' => $activity['object_id']]);
-		Contact::updateFromProbeByURL($activity['object_id'], true);
+		Contact::updateFromProbeByURL($activity['object_id']);
 	}
 
 	/**
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index 226ad60104..88c23f2be6 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -679,7 +679,7 @@ class Receiver
 			return;
 		}
 
-		if (Contact::updateFromProbe($cid, '', true)) {
+		if (Contact::updateFromProbe($cid)) {
 			Logger::info('Update was successful', ['id' => $cid, 'uid' => $uid, 'url' => $url]);
 		}
 
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 96b1450aed..2956e7bfc8 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -2878,14 +2878,13 @@ class DFRN
 	 * Checks if the given contact url does support DFRN
 	 *
 	 * @param string  $url    profile url
-	 * @param boolean $update Update the profile
 	 * @return boolean
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function isSupportedByContactUrl($url, $update = false)
+	public static function isSupportedByContactUrl($url)
 	{
-		$probe = Probe::uri($url, Protocol::DFRN, 0, !$update);
+		$probe = Probe::uri($url, Protocol::DFRN);
 		return $probe['network'] == Protocol::DFRN;
 	}
 }
diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index 74a055265d..c00c029cd4 100644
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -544,15 +544,8 @@ class OStatus
 						} elseif ($item['contact-id'] < 0) {
 							Logger::log("Item with uri ".$item["uri"]." is from a blocked contact.", Logger::DEBUG);
 						} else {
-							// We are having duplicated entries. Hopefully this solves it.
-							if (DI::lock()->acquire('ostatus_process_item_insert')) {
-								$ret = Item::insert($item);
-								DI::lock()->release('ostatus_process_item_insert');
-								Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
-							} else {
-								$ret = Item::insert($item);
-								Logger::log("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
-							}
+							$ret = Item::insert($item);
+							Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 						}
 					}
 				}
@@ -2218,14 +2211,13 @@ class OStatus
 	 * Checks if the given contact url does support OStatus
 	 *
 	 * @param string  $url    profile url
-	 * @param boolean $update Update the profile
 	 * @return boolean
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function isSupportedByContactUrl($url, $update = false)
+	public static function isSupportedByContactUrl($url)
 	{
-		$probe = Probe::uri($url, Protocol::OSTATUS, 0, !$update);
+		$probe = Probe::uri($url, Protocol::OSTATUS);
 		return $probe['network'] == Protocol::OSTATUS;
 	}
 }
diff --git a/src/Worker/Cron.php b/src/Worker/Cron.php
index 37d4d4b807..2c264f0746 100644
--- a/src/Worker/Cron.php
+++ b/src/Worker/Cron.php
@@ -168,7 +168,7 @@ class Cron
 				$oldest_id = $contact['id'];
 				$oldest_date = $contact['last-update'];
 			}
-			Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id'], 'force');
+			Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 			++$count;
 		}
 		Logger::info('Initiated update for public contacts', ['interval' => $count, 'id' => $oldest_id, 'oldest' => $oldest_date]);
diff --git a/src/Worker/OnePoll.php b/src/Worker/OnePoll.php
index 40681175d4..00d5694db3 100644
--- a/src/Worker/OnePoll.php
+++ b/src/Worker/OnePoll.php
@@ -61,12 +61,12 @@ class OnePoll
 		}
 
 		if (($contact['network'] != Protocol::MAIL) || $force) {
-			Contact::updateFromProbe($contact_id, '', $force);
+			Contact::updateFromProbe($contact_id);
 		}
 
 		// Special treatment for wrongly detected local contacts
 		if (!$force && ($contact['network'] != Protocol::DFRN) && Contact::isLocalById($contact_id)) {
-			Contact::updateFromProbe($contact_id, Protocol::DFRN, true);
+			Contact::updateFromProbe($contact_id, Protocol::DFRN);
 			$contact = DBA::selectFirst('contact', [], ['id' => $contact_id]);
 		}
 
diff --git a/src/Worker/UpdateContact.php b/src/Worker/UpdateContact.php
index 67bc45ef98..74fbe2c22a 100644
--- a/src/Worker/UpdateContact.php
+++ b/src/Worker/UpdateContact.php
@@ -29,14 +29,11 @@ class UpdateContact
 	/**
 	 * Update contact data via probe
 	 * @param int    $contact_id Contact ID
-	 * @param string $command
 	 */
-	public static function execute($contact_id, $command = '')
+	public static function execute($contact_id)
 	{
-		$force = ($command == "force");
+		$success = Contact::updateFromProbe($contact_id);
 
-		$success = Contact::updateFromProbe($contact_id, '', $force);
-
-		Logger::info('Updated from probe', ['id' => $contact_id, 'force' => $force, 'success' => $success]);
+		Logger::info('Updated from probe', ['id' => $contact_id, 'success' => $success]);
 	}
 }