/usr/share/opendnssec/migrate_zone_delete.mysql is in opendnssec-common 1:1.4.9-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # Migrate existing database for zone delete fix
alter table dnsseckeys drop foreign key dnsseckeys_ibfk_1;
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