Displaying 500 Errors on Datalens

[RoadToRaichu]

Current behavior:
When using datalens, I started seeing 500 errors appear. These errors seem to disrupt the normal workflow and functionality of the application.
Reproduction steps:

1. Open 2 tabs with Datalens
2. Open dashboards on both tabs and switch to editing mode.
3. When you try to save changes on the tab that first opened editing, you will receive an error 500.

Screenshots/logs:

datalens-us

"msg":"[Express POST] [updateEntry] ERR.US.ENTRY_IS_LOCKED [9a995701-e1fd-48e9-b679-aa7247078711]"}
"msg":"[Express POST] Request completed [9a995701-e1fd-48e9-b679-aa7247078711]"}
172.18.0.3 - - [26/Dec/2023:09:59:38 +0000] "POST /v1/entries/qdacat4ym1sef HTTP/1.1" 423 165 "-" "axios/1.4.0"

tmp_datalens-us.txt

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
datalens-ui

"msg":"[Express POST] Request failed
 [9a995701-e1fd-48e9-b679-aa7247078711]"}
78.30.254.221 - - [26/Dec/2023:09:59:38 +0000] 
"POST /api/dash/v1/dashboards/qdacat4ym1sef HTTP/1.0"
 500 33 "https://datalens.erp.proceres.ru/qdacat4ym1sef-rodnoe-sevastopol-arhiv" 
"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:120.0) Gecko/20100101 Firefox/120.0"

tmp_datalens-ui.txt

I am attaching any relevant screenshots or logs that may help in understanding and solving the problem.
Development environment:
Datalens-ui version: latest and 0.795.0
Datalens-us version: latest and 0.96.0
Browser/OS: Mozilla Firefox/Ubuntu
Docker version: 24.0.5, build 24.0.5-0ubuntu1~22.04.1

We greatly appreciate your assistance in resolving this issue.

[Marginy605]

Hi, thanks for report!
There is an architectural feature that if user is editing dashboard right now, you get warning that the same dashboard has been already edited by someone (even if is is the same user):

So if you are ignoring this warning and you want to force edit anyway, that means that editing in first tab is invalid. We don't have any possibility to merge changes somehow for both edited versions. That's why editor in first tab receive error on save.

We will improve this case so that first editor could receive some message that this dash has been already edited by someone and this changes could not be saved on old version of dashboard.