diff --git a/htdocs/PI/index.php b/htdocs/PI/index.php
index 3c90c59e7..e74c29d6b 100644
--- a/htdocs/PI/index.php
+++ b/htdocs/PI/index.php
@@ -398,10 +398,10 @@ function authByIdentifier($forceStrictForHosts = false) {
             // Check if it is registered API Authentication credential.
 
             $authEntServ = \Factory::getAPIAuthenticationService();
-            $authEnt = $authEntServ->getAPIAuthentication($this->identifier);
+            $authEnts = $authEntServ->getAPIAuthentication($this->identifier);
 
-            if (!is_null($authEnt)) {
-                $authEntServ->updateLastUseTime($authEnt);
+            if (count($authEnts) > 0) {
+                $authEntServ->updateLastUseTime($authEnts);
                 $authenticated = true;
             }
 
diff --git a/htdocs/web_portal/static_html/goc5_logo.html b/htdocs/web_portal/static_html/goc5_logo.html
index 4d96abe9f..37cd6ed9f 100644
--- a/htdocs/web_portal/static_html/goc5_logo.html
+++ b/htdocs/web_portal/static_html/goc5_logo.html
@@ -4,7 +4,7 @@
 <!--	<img src="img/Logo-1.6.png" class="logo_image" height="39" style="vertical-align: middle;"/>-->
   <h3    class="Logo_Text Small_Bottom_Margin Standard_Padding"
          style="vertical-align: middle; margin-left: 0.2em;">
-         GOCDB 5.10.2
+         GOCDB 5.10.3
      </h3>
 
 </a>
diff --git a/lib/Gocdb_Services/APIAuthenticationService.php b/lib/Gocdb_Services/APIAuthenticationService.php
index 60e10ab01..1e14f476b 100644
--- a/lib/Gocdb_Services/APIAuthenticationService.php
+++ b/lib/Gocdb_Services/APIAuthenticationService.php
@@ -37,7 +37,7 @@ function __construct() {
      * Returns the APIAuthentication entity associated with the given identifier.
      *
      * @param string $ident Identifier (e.g. X.509 DN as string)
-     * @return \APIAuthentication APIAuthentication associated with this identifier
+     * @return \APIAuthentication[] APIAuthentication associated with this identifier
      */
     public function getAPIAuthentication($ident) {
 
@@ -48,12 +48,13 @@ public function getAPIAuthentication($ident) {
         $dql = "SELECT a FROM APIAuthentication a " .
                 "WHERE (a.identifier = :ident)" ;
 
+        /* @var $qry \Doctine\DBAL\query */
         $qry = $this->em->createQuery($dql);
         $qry->setParameter('ident', $ident);
 
-        $apiAuth = $qry->getOneOrNullResult();
+        $apiAuths = $qry->getResult();
 
-        return $apiAuth;
+        return $apiAuths;
     }
 
         /**
@@ -188,17 +189,19 @@ public function editAPIAuthentication(\APIAuthentication $authEntity, \User $use
     /**
      * Set the last use time field to the current UTC time
      *
-     * @param \APIAuthentication $authEntity entity to update
+     * @param \APIAuthentication[] $authEntities entity to update
      * @throws \Exception if the update fails
      */
-    public function updateLastUseTime(\APIAuthentication $authEntity) {
-
+    public function updateLastUseTime(array $authEntities)
+    {
         $this->em->getConnection()->beginTransaction();
 
         try {
-            $authEntity->setLastUseTime();
-
-            $this->em->persist($authEntity);
+            /* @var \APIAuthentication $authEntity */
+            foreach ($authEntities as $authEntity) {
+                $authEntity->setLastUseTime();
+                $this->em->persist($authEntity);
+            }
 
             $this->em->flush();
             $this->em->getConnection()->commit();
@@ -220,14 +223,15 @@ public function updateLastUseTime(\APIAuthentication $authEntity) {
      */
     public function uniqueAPIAuthEnt(\Site $site, $identifier, $type) {
 
-        $authEnt = $this->getAPIAuthentication($identifier, $type);
+        $authEntities = $this->getAPIAuthentication($identifier, $type);
 
-        if (!is_null($authEnt) &&
-                $authEnt->getParentSite()->getId() == $site->getId()) {
-            throw new \Exception(
-                "An authentication object of type \"$type\" and with identifier " .
-                "\"$identifier\" already exists for " . $site->getName()
-            );
+        foreach ($authEntities as $authEnt) {
+            if ($authEnt->getParentSite()->getId() == $site->getId()) {
+                throw new \Exception(
+                    "An authentication object of type \"$type\" and with identifier " .
+                    "\"$identifier\" already exists for " . $site->getName()
+                );
+            }
         }
     }
     /**
diff --git a/tests/unit/lib/Gocdb_Services/APIAuthenticationServiceTest.php b/tests/unit/lib/Gocdb_Services/APIAuthenticationServiceTest.php
index 39b6b486d..2888d6f38 100644
--- a/tests/unit/lib/Gocdb_Services/APIAuthenticationServiceTest.php
+++ b/tests/unit/lib/Gocdb_Services/APIAuthenticationServiceTest.php
@@ -170,10 +170,11 @@ public function testGetAPIAuthentication()
 
         $ident = '/CN=A Dummy Subject';
         $type = 'X.509';
-      // Start with no APIAuthentication entities to be found
-        $this->assertNull(
+        // Start with no APIAuthentication entities to be found
+        $this->assertCount(
+            0,
             $authEntServ->getAPIAuthentication($ident),
-            "Non-null value returned when searching for APIAuthentication entity " .
+            "Non-zero count returned when searching for APIAuthentication entity " .
             "for id:{$ident} when expected none."
         );
 
@@ -194,9 +195,15 @@ public function testGetAPIAuthentication()
 
         $authEntMatched = $authEntServ->getAPIAuthentication($ident);
 
+        $this->assertCount(
+            1,
+            $authEntMatched,
+            "Failed to return single APIAuthentication entity searching for id:{$ident}."
+        );
+
         $this->assertTrue(
-            $authEnt === $authEntMatched,
-            "Failed to return APIAuthentication entity for id:{$ident}."
+            $authEnt === $authEntMatched[0],
+            "Failed to return matching APIAuthentication entity searching for for id:{$ident}."
         );
     }
 }