There's an OOTB relationship from TICKET to RELATEDRECORD with the ID of RELATEDWO. The WHERE clause it uses is:
recordkey=:ticketid and class =:class and relatedrecclass in (select value from synonymdomain where domainid ='WOCLASS' and maxvalue in ('CHANGE', 'RELEASE','ACTIVITY', 'WORKORDER'))
>>When I try to use the relationship REL_WO.RECORDKEY on the SR application
It should be REL_WO.RELATEDRECKEY