If 'disableschema' is called, all currently enabled contexts are deactivated with the configured reason identifier. When 'enableschema' is called afterwards only those contexts in the given schema are enabled, which have the special reason identifier set. This is needed to preserve the deactivation contexts due to other reasons. Therefore the file /opt/open-xchange/etc/plugin/hosting.properties was extended, to allow adjustment of this identifier:

=== snip ===
# The reason ID to use when contexts are disabled due to a schema move. This id will not be
# stored in the 'reason_text' table but must not conflict with existing reasons. Otherwise
# wrong contexts may get enabled after a schema move.
SCHEMA_MOVE_MAINTENANCE_REASON=1431655765
=== snap ===