XF 1.5 Unable to delete Prefix


I’m getting the following error when I try to delete a prefix from my Admin CP.

Server Error

Mysqli statement execute error : Truncated incorrect DOUBLE value: '12,13,18'

    Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 297
    Zend_Db_Statement->execute() in Zend/Db/Adapter/Abstract.php at line 479
    Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 632
    Zend_Db_Adapter_Abstract->update() in XenForo/DataWriter/ThreadPrefix.php at line 153
    XenForo_DataWriter_ThreadPrefix->_postDelete() in XenForo/DataWriter.php at line 1793
    XenForo_DataWriter->delete() in XenForo/Controller.php at line 1021
    XenForo_Controller->_deleteData() in XenForo/ControllerAdmin/ThreadPrefix.php at line 179
    XenForo_ControllerAdmin_ThreadPrefix->actionDelete() in XenForo/FrontController.php at line 351
    XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
    XenForo_FrontController->run() in /home/scriptdr/public_html/admin.php at line 13

I’m not sure it an add-on is causing this. I have recently installed Multi Prefix add-on by Xon and Hide Prefix from user groups by Sonnb. I have disabled both of them, but I’m still getting the above error.