As per Microsoft: "A -1019 error is reported when a page that is expected to be in use is uninitialized or empty. If the page number field on a page in use is 0x00000000, a -1019 error is reported instead of a -1018 error, even though the page might also fail its checksum test. However, it is more common that a -1019 error is caused because the file system was corrupted or mapped pages into the database file that do not belong in the file". See M314917 to find out how you can recover from this error.
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