fix: Convert BackedEnum to scalar value when binding a parameter

Author: wmouwen

src/Persisters/Entity/BasicEntityPersister.php

@@ -693,11 +693,11 @@ protected function prepareUpdateData(object $entity, bool $isInsert = false): ar
                 $targetColumn = $joinColumn->referencedColumnName;
                 $quotedColumn = $this->quoteStrategy->getJoinColumnName($joinColumn, $this->class, $this->platform);
 
-                $this->quotedColumns[$sourceColumn]  = $quotedColumn;
-                $this->columnTypes[$sourceColumn]    = PersisterHelper::getTypeOfColumn($targetColumn, $targetClass, $this->em);
-                $result[$owningTable][$sourceColumn] = $newValId
-                    ? $newValId[$targetClass->getFieldForColumn($targetColumn)]
-                    : null;
+                $this->quotedColumns[$sourceColumn] = $quotedColumn;
+                $this->columnTypes[$sourceColumn]   = PersisterHelper::getTypeOfColumn($targetColumn, $targetClass, $this->em);
+
+                $newValue                            = $newValId ? $newValId[$targetClass->getFieldForColumn($targetColumn)] : null;
+                $result[$owningTable][$sourceColumn] = $newValue instanceof BackedEnum ? $newValue->value : $newValue;
             }
         }