diff --git a/src/Database/Database.php b/src/Database/Database.php
index 361a3248d9..28283b1c81 100644
--- a/src/Database/Database.php
+++ b/src/Database/Database.php
@@ -1461,8 +1461,12 @@ class Database
 
 		$row = $this->fetchFirst($sql, $condition);
 
-		// Ensure to always return either a "null" or a numeric value
-		return is_numeric($row['count']) ? (int)$row['count'] : $row['count'];
+		if (!isset($row['count'])) {
+			$this->logger->notice('Invalid count.', ['table' => $table, 'row' => $row, 'expression' => $expression, 'condition' => $condition_string, 'callstack' => System::callstack()]);
+			return 0;
+		} else {
+			return (int)$row['count'];
+		}
 	}
 
 	/**
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index 93e745456a..3a214d00be 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -2757,12 +2757,14 @@ class Contact
 		return null;
 	}
 
-	public static function removeFollower($importer, $contact)
+	public static function removeFollower(array $contact)
 	{
-		if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
+		if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
 			DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
-		} else {
+		} elseif (!empty($contact['id'])) {
 			self::remove($contact['id']);
+		} else {
+			DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
 		}
 	}
 
diff --git a/src/Module/Contact.php b/src/Module/Contact.php
index ceb2b6757c..281e690086 100644
--- a/src/Module/Contact.php
+++ b/src/Module/Contact.php
@@ -290,11 +290,17 @@ class Contact extends BaseModule
 				$contact_id = $data['user'];
 			}
 
-			$contact = DBA::selectFirst('contact', [], ['id' => $contact_id, 'uid' => [0, local_user()], 'deleted' => false]);
+			if (!empty($data)) {
+				$contact = DBA::selectFirst('contact', [], [
+					'id'      => $contact_id,
+					'uid'     => [0, local_user()],
+					'deleted' => false
+				]);
 
-			// Don't display contacts that are about to be deleted
-			if ($contact['network'] == Protocol::PHANTOM) {
-				$contact = false;
+				// Don't display contacts that are about to be deleted
+				if (DBA::isResult($contact) && !empty($contact['network']) && $contact['network'] == Protocol::PHANTOM) {
+					$contact = false;
+				}
 			}
 		}
 
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 47a5300352..1fe527f407 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -1102,7 +1102,7 @@ class Processor
 			return;
 		}
 
-		Contact::removeFollower($owner, $contact);
+		Contact::removeFollower($contact);
 		Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
 	}
 
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 4ccd259f21..6797608e61 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -1584,7 +1584,7 @@ class DFRN
 			}
 			if ($activity->match($item["verb"], Activity::UNFOLLOW)) {
 				Logger::log("Lost follower");
-				Contact::removeFollower($importer, $contact, $item);
+				Contact::removeFollower($contact);
 				return false;
 			}
 			if ($activity->match($item["verb"], Activity::REQ_FRIEND)) {
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 48d7a3371c..8ab89d950f 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -2211,7 +2211,7 @@ class Diaspora
 				return true;
 			} else {
 				Logger::log("Author ".$author." doesn't want to follow us anymore.", Logger::DEBUG);
-				Contact::removeFollower($importer, $contact);
+				Contact::removeFollower($contact);
 				return true;
 			}
 		}
diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index 2404db2df9..4f16f40f11 100644
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -471,7 +471,7 @@ class OStatus
 
 			if ($item["verb"] == Activity::O_UNFOLLOW) {
 				$dummy = null;
-				Contact::removeFollower($importer, $contact, $item, $dummy);
+				Contact::removeFollower($contact);
 				continue;
 			}