Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/dbupdates/patch20190121.sql
===================================================================
diff -u
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/dbupdates/patch20190121.sql	(revision 0)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/dbupdates/patch20190121.sql	(revision 04323e8f7840980eeb50f8ce5f6a6dc718b55ddb)
@@ -0,0 +1,14 @@
+-- Turn off autocommit, so nothing is committed if there is an error
+SET AUTOCOMMIT = 0;
+SET FOREIGN_KEY_CHECKS=0;
+----------------------Put all sql statements below here-------------------------
+
+-- LDEV-4756 Unable to add attachments in Forum
+UPDATE lams_cr_credential set name = "forum" where name = "forumw";
+
+----------------------Put all sql statements above here-------------------------
+
+-- If there were no errors, commit and restore autocommit to on
+COMMIT;
+SET AUTOCOMMIT = 1;
+SET FOREIGN_KEY_CHECKS=1;
\ No newline at end of file
Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/forumApplicationContext.xml
===================================================================
diff -u -rb71c9cb2f96eb891545d32aaca8904051d1e00d5 -r04323e8f7840980eeb50f8ce5f6a6dc718b55ddb
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/forumApplicationContext.xml	(.../forumApplicationContext.xml)	(revision b71c9cb2f96eb891545d32aaca8904051d1e00d5)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/forumApplicationContext.xml	(.../forumApplicationContext.xml)	(revision 04323e8f7840980eeb50f8ce5f6a6dc718b55ddb)
@@ -73,7 +73,7 @@
 	<bean id="forumToolContentHandler" class="org.lamsfoundation.lams.contentrepository.client.ToolContentHandler">
 		<property name="repositoryService"><ref bean="repositoryService"/></property>
 		<property name="repositoryWorkspaceName" ><value>forumworkspace</value></property>
-		<property name="repositoryUser"><value>forumw</value></property>
+		<property name="repositoryUser"><value>forum</value></property>
 		<property name="repositoryId"><value>lams-forum</value></property>
 	</bean>
 
Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/model/Message.java
===================================================================
diff -u -r1ee503e3d0e0228ea8a45025fddf15d9623c0377 -r04323e8f7840980eeb50f8ce5f6a6dc718b55ddb
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/model/Message.java	(.../Message.java)	(revision 1ee503e3d0e0228ea8a45025fddf15d9623c0377)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/model/Message.java	(.../Message.java)	(revision 04323e8f7840980eeb50f8ce5f6a6dc718b55ddb)
@@ -170,6 +170,7 @@
 		while (iter.hasNext()) {
 		    Attachment file = (Attachment) iter.next();
 		    Attachment newFile = (Attachment) file.clone();
+		    newFile.setMessage(msg); // attachment 'owns' the relationship
 		    // use common file node in repository
 		    set.add(newFile);
 		}