What is Jquery select2 error when adding new element?

Question

JavaScript

Good evening, tell me, the solution is such an error
Cannot read property 'current' of null
I'm suffering for the second day. Since I'm not very strong in js, I tried to do everything I could. The essence of the problem is this:
in Djnago I use the django-autocomplete-light
library in the admin panel when loading the page, all existing fields work fine, just add a new dynamic element, it gives an error in the console

console error

Uncaught TypeError: Cannot read property 'current' of null
at HTMLSelectElement. (select2.full.js:5205)
at HTMLSelectElement.dispatch (jquery.js:5183)
at HTMLSelectElement.elemData.handle (jquery.js:4991)
at Object.trigger (jquery.js:8249)
at HTMLSelectElement. (jquery.js:8327)
at Function.each (jquery.js:354)
at jQuery.fn.init.each (jquery.js:189)
at jQuery.fn.init.trigger (jquery.js:8326)
at select2.full.js:3081
at AjaxAdapter.SelectAdapter.current (select2.full.js:3048)

select2.full.js

https://jsfiddle.net/dbelova/f3srwhzt/

I hope very much for your help