** Warning ** Zone Minimum Air Flow Input Method

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Full Warning/Error Description:

   ** Warning ** Since Zone Minimum Air Flow Input Method = CONSTANT, input for Fixed Minimum Air Flow Rate will be ignored.
   **   ~~~   ** Occurs in AirTerminal:SingleDuct:VAV:Reheat = VAV HW RHT 1

This warning doesn't cause any problems, but I would like to resolve it. I ran my model in the OpenStudio Application. I would like to use the constant fraction method, so the model is running as I expected. However, I would like to delete the fixed minimum air flow rate. But when I try to delete it (i.e. backspace and enter), a very big, negative number is entered in it's place. Seems like a bug of some sort. I may enter an answer for this problem that there is no solution and that this bug will first have to be fixed, but I would like to get input from others before I do so.

Edit: Setting the Fixed Minimum Air Flow Rate to Autosized did not solve the problem.