Index: lams_common/src/java/org/lamsfoundation/lams/commonContext.xml
===================================================================
diff -u -r045ebfd1d11d9ed0a1f81a00abb1a2ea373e8d93 -ra20a3b3c23f8f59e7fa25a5c958466f8c8ba73ec
--- lams_common/src/java/org/lamsfoundation/lams/commonContext.xml	(.../commonContext.xml)	(revision 045ebfd1d11d9ed0a1f81a00abb1a2ea373e8d93)
+++ lams_common/src/java/org/lamsfoundation/lams/commonContext.xml	(.../commonContext.xml)	(revision a20a3b3c23f8f59e7fa25a5c958466f8c8ba73ec)
@@ -316,6 +316,7 @@
 				<prop key="update*">PROPAGATION_REQUIRED</prop>
 				<prop key="save*">PROPAGATION_REQUIRED</prop>
 				<prop key="create*">PROPAGATION_REQUIRED</prop>
+				<prop key="delete*">PROPAGATION_REQUIRED</prop>
 				<prop key="rateItem">PROPAGATION_REQUIRED</prop>
 				<prop key="commentItem">PROPAGATION_REQUIRED</prop>
 			</props>
Index: lams_common/src/java/org/lamsfoundation/lams/dbupdates/patch20180625.sql
===================================================================
diff -u
--- lams_common/src/java/org/lamsfoundation/lams/dbupdates/patch20180625.sql	(revision 0)
+++ lams_common/src/java/org/lamsfoundation/lams/dbupdates/patch20180625.sql	(revision a20a3b3c23f8f59e7fa25a5c958466f8c8ba73ec)
@@ -0,0 +1,15 @@
+-- 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-4603 Delete preview lessons with peer review activity doesn't work
+ALTER TABLE lams_rating DROP FOREIGN KEY FK_lams_rating_3;
+ALTER TABLE lams_rating_comment DROP FOREIGN KEY FK_lams_rating_comment_3;
+
+----------------------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/dbupdates/patch20180625.sql
===================================================================
diff -u
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/dbupdates/patch20180625.sql	(revision 0)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/dbupdates/patch20180625.sql	(revision a20a3b3c23f8f59e7fa25a5c958466f8c8ba73ec)
@@ -0,0 +1,20 @@
+-- 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-4603 Delete preview lessons with peer review activity doesn't work
+ALTER TABLE tl_lafrum11_message_rating DROP FOREIGN KEY FK_tl_lafrum11_message_rating_2;
+ALTER TABLE tl_lafrum11_message_rating ADD CONSTRAINT FK_tl_lafrum11_message_rating_2
+  FOREIGN KEY (message_id)
+  REFERENCES tl_lafrum11_message (uid)
+  ON DELETE CASCADE
+  ON UPDATE CASCADE;
+
+----------------------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;
+
Index: lams_tool_larsrc/web/pages/learning/learning.jsp
===================================================================
diff -u -r4583983b64efe1d91fbb47cdde6a759a6a30e859 -ra20a3b3c23f8f59e7fa25a5c958466f8c8ba73ec
--- lams_tool_larsrc/web/pages/learning/learning.jsp	(.../learning.jsp)	(revision 4583983b64efe1d91fbb47cdde6a759a6a30e859)
+++ lams_tool_larsrc/web/pages/learning/learning.jsp	(.../learning.jsp)	(revision a20a3b3c23f8f59e7fa25a5c958466f8c8ba73ec)
@@ -254,7 +254,7 @@
 						<c:if test="${item.complete && item.allowRating}">
 							<div style="display: inline-block">
 							<lams:Rating itemRatingDto="${item.ratingDTO}" 
-								disabled="${mode == 'teacher' || mode == 'author' || finishedLock}" allowRetries="true" />
+								disabled="${mode == 'teacher' || finishedLock}" allowRetries="true" />
 							</div>
 						</c:if>
 					</td>