Index: lams_tool_spreadsheet/src/java/org/lamsfoundation/lams/tool/spreadsheet/dbupdates/patch20160225.sql
===================================================================
diff -u
--- lams_tool_spreadsheet/src/java/org/lamsfoundation/lams/tool/spreadsheet/dbupdates/patch20160225.sql	(revision 0)
+++ lams_tool_spreadsheet/src/java/org/lamsfoundation/lams/tool/spreadsheet/dbupdates/patch20160225.sql	(revision 32817d2762b61fe84a78b31ea092619598e632e7)
@@ -0,0 +1,19 @@
+-- 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-3687 Unable to add marks due to foreign key on spreadsheet_mark table
+
+ALTER TABLE `tl_lasprd10_spreadsheet_mark` DROP FOREIGN KEY `tl_lasprd10_spreadsheet_mark_ibfk_1`;
+
+ALTER TABLE tl_lasprd10_user_modified_spreadsheet DROP FOREIGN KEY FK_tl_lasprd10_user_modified_spreadsheet_1;
+ALTER TABLE tl_lasprd10_user_modified_spreadsheet ADD CONSTRAINT FK_tl_lasprd10_user_modified_spreadsheet_1 FOREIGN KEY (`mark_id`)
+REFERENCES `tl_lasprd10_spreadsheet_mark` (`uid`) ON DELETE SET NULL ON UPDATE NO ACTION;
+
+----------------------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