SQL Server error code
SQL Server error 7987
SQL Server raises error 7987 at severity 16, which marks a problem with the query or data that you can correct.
System table pre-checks: Object ID %d has chain linkage mismatch. %S_PGID->next = %S_PGID, but %S_PGID->prev = %S_PGID. Check statement terminated due to unrepairable error.
| Msg | 7987 |
|---|---|
| Name | DBCC2_PRE_CHECKS_CHAIN_LINKAGE_MISMATCH |
| Severity | 16 |
| Group | 7000–7999 |
What it means
The first phase of a DBCC CHECKDB is to do primitive checks on the data pages of critical system tables. If any errors are found, they cannot be repaired; therefore, the DBCC CHECKDB terminates immediately.