Removed field in dashboard still referenced

[chadh]

I am using a data module on CA 11.1.7 and have a labor dashboard with several tabs and filters to look at hours worked, labor costs, etc.  I see from the EDW side the SQL query being sent from CA still includes a filtered field that was removed and is restricting my data set in the visualization.  Trying to fix the issue I created a new calculation (OT%) to replace the original which had a filter applied at the source, not in all tabs or this tab.  The dashboard appears to work correctly using the new OT% calculation, but the filter that was previously applied (the old OT% calc with a filter restricting OT% range) is still being referenced.  If I delete the old calculated field from the source it breaks the dashboard, which has no visible reference on any of the visualizations.  Any ideas on how to remove the reference without breaking the visualization?