According to T42626 the timestamp should be adjust from varbinary(14) to binary(14) because there is no need to hold infinite.
Affected columns:
flaggedpages.fp_pending_since
flaggedpage_pending.fpp_pending_since
flaggedrevs.fr_rev_timestamp
flaggedrevs.fr_timestamp
flaggedrevs_statistics.frs_timestamp
On the following columns the default of empty string needs to be removed:
flaggedrevs.fr_rev_timestamp
On the following columns the default of infinity needs to be removed:
flaggedpage_config.fpc_expiry