diff --git a/src/Core/Config/Adapter/JITConfigAdapter.php b/src/Core/Config/Adapter/JITConfigAdapter.php
index 0c94f8127..5d06dc2b3 100644
--- a/src/Core/Config/Adapter/JITConfigAdapter.php
+++ b/src/Core/Config/Adapter/JITConfigAdapter.php
@@ -1,7 +1,6 @@
 <?php
 namespace Friendica\Core\Config\Adapter;
 
-use Friendica\Core\Logger;
 use Friendica\Database\DBA;
 
 /**
@@ -58,22 +57,14 @@ class JITConfigAdapter extends AbstractDbaConfigAdapter implements IConfigAdapte
 			// manage array value
 			$value = (preg_match("|^a:[0-9]+:{.*}$|s", $config['v']) ? unserialize($config['v']) : $config['v']);
 
-			if ($key === 'last_worker_execution') {
-				Logger::alert('catchmeifyou', ['store' => $value, 'in_db' => $this->in_db[$cat][$key]]);
-			}
-
 			if (isset($value) && $value !== '') {
 				$this->in_db[$cat][$key] = true;
 				return $value;
-			} else {
-				$this->in_db[$cat][$key] = false;
-				return '!<unset>!';
 			}
-		} else {
-
-			$this->in_db[$cat][$key] = false;
-			return '!<unset>!';
 		}
+
+		$this->in_db[$cat][$key] = false;
+		return '!<unset>!';
 	}
 
 	/**
@@ -99,10 +90,6 @@ class JITConfigAdapter extends AbstractDbaConfigAdapter implements IConfigAdapte
 			$this->in_db[$cat][$key] = false;
 		}
 
-		if ($key === 'last_worker_execution') {
-			Logger::alert('catchmeifyou', ['db' => $dbvalue, 'store' => $stored, 'in_db' => $this->in_db[$cat][$key]]);
-		}
-
 		if (($stored === $dbvalue) && $this->in_db[$cat][$key]) {
 			return true;
 		}
diff --git a/src/Core/Config/Adapter/JITPConfigAdapter.php b/src/Core/Config/Adapter/JITPConfigAdapter.php
index c5f3a381e..d3c38623b 100644
--- a/src/Core/Config/Adapter/JITPConfigAdapter.php
+++ b/src/Core/Config/Adapter/JITPConfigAdapter.php
@@ -57,13 +57,14 @@ class JITPConfigAdapter extends AbstractDbaConfigAdapter implements IPConfigAdap
 			// manage array value
 			$value = (preg_match("|^a:[0-9]+:{.*}$|s", $pconfig['v']) ? unserialize($pconfig['v']) : $pconfig['v']);
 
-			$this->in_db[$uid][$cat][$key] = true;
-			return $value;
-		} else {
-
-			$this->in_db[$uid][$cat][$key] = false;
-			return '!<unset>!';
+			if (isset($value) && $value !== '') {
+				$this->in_db[$uid][$cat][$key] = true;
+				return $value;
+			}
 		}
+
+		$this->in_db[$uid][$cat][$key] = false;
+		return '!<unset>!';
 	}
 
 	/**
diff --git a/src/Core/Config/Adapter/PreloadConfigAdapter.php b/src/Core/Config/Adapter/PreloadConfigAdapter.php
index fa691a16d..b1866a259 100644
--- a/src/Core/Config/Adapter/PreloadConfigAdapter.php
+++ b/src/Core/Config/Adapter/PreloadConfigAdapter.php
@@ -55,11 +55,12 @@ class PreloadConfigAdapter extends AbstractDbaConfigAdapter implements IConfigAd
 			// manage array value
 			$value = (preg_match("|^a:[0-9]+:{.*}$|s", $config['v']) ? unserialize($config['v']) : $config['v']);
 
-			return $value;
-		} else {
-
-			return '!<unset>!';
+			if (isset($value) && $value !== '') {
+				return $value;
+			}
 		}
+
+		return '!<unset>!';
 	}
 
 	/**
diff --git a/src/Core/Config/Adapter/PreloadPConfigAdapter.php b/src/Core/Config/Adapter/PreloadPConfigAdapter.php
index e79a4a1e3..857f2b176 100644
--- a/src/Core/Config/Adapter/PreloadPConfigAdapter.php
+++ b/src/Core/Config/Adapter/PreloadPConfigAdapter.php
@@ -71,10 +71,11 @@ class PreloadPConfigAdapter extends AbstractDbaConfigAdapter implements IPConfig
 			// manage array value
 			$value = (preg_match("|^a:[0-9]+:{.*}$|s", $config['v']) ? unserialize($config['v']) : $config['v']);
 
-			return $value;
-		} else {
-			return '!<unset>!';
+			if (isset($value) && $value !== '') {
+				return $value;
+			}
 		}
+		return '!<unset>!';
 	}
 
 	/**
diff --git a/src/Core/Config/Configuration.php b/src/Core/Config/Configuration.php
index 48220c2de..2ac0da0ad 100644
--- a/src/Core/Config/Configuration.php
+++ b/src/Core/Config/Configuration.php
@@ -2,8 +2,6 @@
 
 namespace Friendica\Core\Config;
 
-use Friendica\Core\Logger;
-
 /**
  * This class is responsible for all system-wide configuration values in Friendica
  * There are two types of storage
@@ -116,10 +114,6 @@ class Configuration
 	 */
 	public function set($cat, $key, $value)
 	{
-		if ($key === 'last_worker_execution') {
-			Logger::alert('catchmeifyou', ['value' => $value]);
-		}
-
 		// set the cache first
 		$cached = $this->configCache->set($cat, $key, $value);
 
diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index 13db8d97e..4007a7923 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -277,8 +277,6 @@ class Worker
 			$age = (time() - self::$last_update) / 60;
 			self::$last_update = time();
 
-			Logger::alert('last_update', ['age' => $age, 'last_update' => self::$last_update]);
-
 			if ($age > 1) {
 				$stamp = (float)microtime(true);
 				DBA::update('workerqueue', ['executed' => DateTimeFormat::utcNow()], ['pid' => $mypid, 'done' => false]);