Hi guardian
Unfortunately I also can not recreate this issue. For investigation it would be interesting for me to look to the content of GridUser once with the line inserted by jOpenSim and compare it with the line OpenSim recreated after deletion.
If you just want to disable jOpenSim to add this line for now, there are 3 files where this can happen:
/components/com_opensim/models/inworld.php (line 97 and 98)
/administrator/components/com_opensim/models/user.php (line 167 and 168)
/plugins/user/jopensimregister/jopensimregister.php (line 316 and 317)
These lines should look like:
$this->_osgrid_db->setQuery($insertquery['grid']);
$retval = $this->_osgrid_db->query();
If you remove those lines or comment them out, jOpenSim will not create this line.
Of course this only can be a temporary solution for now and I would really like to investigate this closer to be able to provide you with a permanent solution
Greetz
FoTo50