help!Cache status of object for Central Adapter Engine is incorrect

this problem cconfused me several days!

version:PI 7.1

after i activate the communication channel, the cache not update for central adapter engine

problem: in cache status overview, the update for central adapter engine not yet started, but notification is ok.

the update for integration server and mapping run time are all correct.

then when i display wsdl for sender agreement(SOAP sender), show message:Cache status of object abcd123 for Central Adapter Engine is incorrect

if i ignore this message, error message popup:dapter Engine af.xid.sapittest for communication channel abcd123 not registered in SLD

who can help me solve this problem.

thank you in advance.