several kanban boards in one project and filters

[Maxim Medvedkov]

hello all!

I have some kanban boards. One main and the other with epic filtering.
There are many tasks like Epic. To hide Epics and some Tasks on the main board, I use the disable filter "issuetype! = Epic and issuekey not in (labsr-165, labsr-166, labsr-167, labsr-151)."
To hide tasks from other boards from the main board, I use the main filter "project =" Labs Research "AND issuekey not in (labsr-199, labsr-200, labsr-201, labsr-202, labsr-203, labsr-204, labsr -205, labsr-206, labsr-207, labsr-208, labsr-209, labsr-210, labsr-211, labsr-212, labsr-213, labsr-214, labsr-215, labsr-216, labsr-217 ) ORDER BY Rank ASC ". Where labsr-199 is an epic for another board, and labsr-200-217 is the task of this epic.
Such a filter is not beautiful and requires manual adjustment when adding tasks to the epic labsr-199.
BUT. If I change the main filter to "project =" Labs Research "AND" Epic Link "! = LABSR-199", then the main board epics are not displayed at all.
How to hide epics and their tasks from the main board?