Call to destroy error?

I got this one when trying to command a party to target 1 monster that came out of a crypt
@yshan ? I hope I got the right person

develop-2786 (x64)
…t_server_commands/combat_server_commands_service.lua:309: attempt to call method ‘destroy’ (a nil value)
stack traceback:
[C]: in function ‘destroy’
…t_server_commands/combat_server_commands_service.lua:309: in function ‘_remove_marker’
…t_server_commands/combat_server_commands_service.lua:478: in function ‘_issue_party_event’
…t_server_commands/combat_server_commands_service.lua:463: in function <…t_server_commands/combat_server_commands_service.lua:462>

A post was merged into an existing topic: Attempt to call method ‘destroy’ (a nil value) - in function ‘_remove_marker’