Hello crash my server

2016-11-14 12:05:08 EffectTriggerSpell of spell 2641: triggering unknown spell id 47531
2016-11-14 12:05:45 Delete GameObject (GUID: 0 Entry: 161557) that has references in invalid creature 2029407 GO list. Crash possible.
2016-11-14 12:05:45 Delete GameObject (GUID: 0 Entry: 161557 SpellId 0 LinkedGO 0) that lost references to owner (GUID 2029407 Type 'creature') GO list. Crash possible later.
2016-11-14 12:05:45 Delete GameObject (GUID: 0 Entry: 161557 SpellId 0 LinkedGO 0) that lost references to owner (GUID 2029407 Type 'creature') GO list. Crash possible later.