We are currently creating a workflow in order to massively change the deal owners of many contacts so they are the same as the task owner in those deals, but we are encountering one problem: when a contact has more than one deal, the workflow changes the deal owner of all the deals existing, and we just need to change one of them.
We would like to have a deal ID tag so we can use it on our workflows and just change one of the deals of the contact instead of all of them.
If you have less number of such deals, then u can make use of association labels , these lable helps in distiguishing the deals. However, as of now these label assignment cann't be done automatically.