M views are getting invalid whenever its selected from

 Hello All,

I have a M-view with defination as :

CREATE MATERIALIZED VIEW MV_HESA_POP_DETAILS MATERIALIZED VIEW MV_HESA_POP_DETAILS

BUILD IMMEDIATE

REFRESH FORCE ON DEMAND

WITH PRIMARY KEY

AS

REFRESH FORCE ON DEMAND

WITH PRIMARY KEY

AS

WITH PRIMARY KEY

AS

AS

SELECT scj.scj_stuc,scj.scj_ayrc,scj.scj_code,scj.scj_hsin,scj.scj_estc,

scj.scj_sprc,scj.scj_qenc,sce.sce_scjc,sce.sce_ayrc,sce.sce_crsc,sce.sce_prgc,sce.sce_rouc, .scj_sprc,scj.scj_qenc,sce.sce_scjc,sce.sce_ayrc,sce.sce_crsc