I see quite a few lines like this in the error log in one of the sites I’m maintaining since recently. It looks like a check is missing.
PHP Warning: Undefined array key "log_type_id" in /.../wp-content/plugins/mainwp-child/modules/changes-logs/classes/class-changes-logs-logger.php on line 563
A fix for this issue was included in version 6.1.7 of the MainWP Child plugin released today.
Thanks again for reporting this to us.
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