Game crashing

what did you change in terms of values on any mod youve installed ie server value or SPT-AKI profile editor.

in essence what have you changed in terms of these mods?

so is this a 3.0.0 version or 2.3.1?

have you made any changes since the recent update or have you done anything before this message came up?

in that case i couldnt even think of an answer mate so my best bet is to just try find the root of the message on there so go into files etc look for the files correlated by name

Quite common issue, although usually it's different item.
The error is in your profile, locate it in Gamefolder/User/Profiles
Open it via Notepad++, Ctrl-F that ID you have in error, you'll required to find field of this said item
And delete it.
It may look like this

{

"_id": "d60cd11b333b3eacf9cefa40",

"_tpl": "59e5d83b86f7745aed03d262",

"parentId": "e17f485a8e7f7ac8a977ae7a",

"slotId": "mod_magazine"

},

Delete the field including starting bracket "{" and ending bracket "}", if it was the last field, remove the comma from pre-last field.