ERROR: invalid page header in block

["MG" <pgsql-admin@xxxxxxxxxxxx>]

Hello,

 

I have the following error and I'm a bit worried:

 

SELECT COUNT(*) AS total FROM (SELECT "oid", * FROM "public"."lock") AS sub

-> ERROR:  invalid page header in block 0 of relation "lock"

delete from lock where bildschirmnr=16

-> ERROR:  invalid page header in block 0 of relation "lock"

Any ideas whats going on?

Thanks for any help

Michaela