Seaquel
SQL Server error code

SQL Server error 556

SQL Server raises error 556 at severity 16, which marks a problem with the query or data that you can correct.

INSERT EXEC failed because the stored procedure altered the schema of the target table.
Msg556
NameWRONGPAGE
Severity16
Group0–999

What it means

Query store is on.

Source: Database Engine events and errors