[daren adler]

I get this using your plugin

/01/2020 - 09:55:53: [SM] Exception reported: Client index -1 is invalid
L 12/01/2020 - 09:55:53: [SM] Blaming: sm_grenadetrail.smx
L 12/01/2020 - 09:55:53: [SM] Call stack trace:
L 12/01/2020 - 09:55:53: [SM] [0] IsClientInGame
L 12/01/2020 - 09:55:53: [SM] [1] Line 123, /home/groups/sourcemod/upload_tmp/php66tB7V.sp::CreateSpriteTrail
L 12/01/2020 - 09:55:53: [SM] [2] Line 117, /home/groups/sourcemod/upload_tmp/php66tB7V.sp::On_npc_grenade_frag_EntityCreat edNextFrame

please help.