I'am Unable to execute the update script error ORA-00971:missing SET keyword.Please let me know the

Unable to execute the below update script

update APPS.WIP_EAM_WORK_REQUESTS A

JOIN APPS.wip_discrete_jobs B

ON (A.wip_entity_id = B.wip_entity_id)

SET  A.WORK_REQUEST_STATUS_ID = 6

where A.wip_entity_id = B.wip_entity_id

and B.STATUS_TYPE = '12'

and A.WORK_REQUEST_STATUS_ID = '4'

AND B.ORGANIZATION_ID = '93'

AND TRUNC(A.CREATION_DATE) BETWEEN '20-DEC-2016' AND '30-DEC-2016' ;

error message := ORA-00971:missing SET keyword

Please let me know the reason