FIX #20391 TIME 0 fix merge conflict

migration/21.03/210321.sql

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--- Model migration script - 21.03.20 to 21.03.21                            --
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--- *************************************************************************--
---DATABASE_UPDATE|res_letterbox|indexing_models_fields
-
-UPDATE res_letterbox SET process_limit_date = NULL;
-UPDATE indexing_models_fields SET enabled = false, default_value = NULL WHERE identifier = 'processLimitDate';
-
-UPDATE parameters SET param_value_string = '21.03.21' WHERE id = 'database_version';