The element in the screenshot comes from the mail_message
table and show a stage change for a lead from QUALIFIES
to INACTIFS
but the body column of the table is empty so I suspect that there is an other table that store this information but I can't find it.
I have tried to find any table that use or is linked to the crm_stage
table or try to find table that are linked to crm_lead
that may be connected to the stage but I found nothing that could help.
I have tried to look into the all related table to both crm_lead
and mail_message
as well but none of them have any table that contains any stage_id or similar column.
If you wanna find out how that works you need to debug in the tracking methods of the mail.thread
model located in the mail module