I need to change the owner of this board to myself:
I have gone into Systems and changed shared filters and it did not update the board:
There are two boards in the project, I need to change the owner of the kanban board not the agile board.
Adding to what Ivan said as a Jira administrator you also can change the board's administrator - probably you are after that solution.
Please see here for further information:
https://support.atlassian.com/jira-software-cloud/docs/configure-a-classic-board/
For changing ownership of filters you were already at the right place - please double check in order to select the right one:
https://support.atlassian.com/jira-cloud-administration/docs/manage-shared-filters/
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