diff --git a/phpgwapi/inc/galaxia_workflow/src/ProcessManager/ProcessManager.php b/phpgwapi/inc/galaxia_workflow/src/ProcessManager/ProcessManager.php
index ca253c4ba1..ed76638013 100644
--- a/phpgwapi/inc/galaxia_workflow/src/ProcessManager/ProcessManager.php
+++ b/phpgwapi/inc/galaxia_workflow/src/ProcessManager/ProcessManager.php
@@ -479,6 +479,10 @@ class ProcessManager extends BaseManager {
     $this->query($query);
     $query = "delete from ".GALAXIA_TABLE_PREFIX."user_roles where wf_p_id=$pId";
     $this->query($query);
+
+	// Remove process instances
+	$query = "delete from ".GALAXIA_TABLE_PREFIX."instances where wf_p_id=$pId";
+    $this->query($query);
     
     // Remove the directory structure
     if (!empty($name) && is_dir(GALAXIA_PROCESSES.SEP."$name")) {