Hi Samo Arko,

From my knowledge, it is not possible directly.

The Log model (mail.tracking.value) have field Changed Field. It will create the log data according to this field.

In the current case there is no Changed Fields in the Task Model. Field is in account.analytic.line ​model.

But there are some solutions for this. if you only just want to see the changes.

If you are a developer, try to do one of the following solution.

Inherit the write function in account.analytic.line model. You will get enough information from write function.

Like Field Name, Old Value, New Value, Write uid etc.

Try with your skill to make the data's in a beautiful form(body) and post that in Related Task Model.

Eg : - self.task_id.message_post(subject="Field value in One2many Changed", body=body, message_type='comment', author_id= self.env.user.partner_id.id)

body should be like this : body = "Field Name : Old Value --> New Value"

Thank You.