Seaquel
SQL Server error code

SQL Server error 8712

SQL Server raises error 8712 at severity 16, which marks a problem with the query or data that you can correct.

Index '%.*ls', specified in the USE PLAN hint, does not exist. Specify an existing index, or create an index with the specified name.
Msg8712
NameUSEPLAN_ERR_NO_INDEX
Severity16
Group8000–8999

What it means

An index that is specified in the USE PLAN hint does not exist.

Source: Database Engine events and errors