Incorrect value "" for int field "max_columns" when importing to Zabbix 5.0

[aLuViAn87]

Zabbix Version : 5.0
OS : CentOS 7

After adding the python file to external scripts, I tried to import the xml template file and it threw the error : Incorrect value "" for int field "max_columns".
I have cloned the files from github and made sure there are no dos/unix conversion issues. I checked the file and it had <max_columns>3</max_columns>. Tried deleting the lines, same error occurred.
Nothing has been written in zabbix server logs during the import.
I know Zabbix 5 is new and there might be compatibility issues, but I would appreciate if a possible workaround is available.
Let me know if more information is needed.

[fpiccinali]

Try to edit the xml files and set version to 5

see my diff here appsinet/bareos-zabbix#5

[lulkek]

When importing a template into the web panel, an error occurs: Incorrect value "" for the integer field "max_columns".
Zabbix-server version 4.4.7