I have two entries for the same client -one for their PH matter and the other for their Trial matter. I want to be able to move their $$ from the PH IOLTA matter (since the money was never used) to their IOLTA for the trial matter. Can this be done?

Long story short, I have a client that we have represented both in the Preliminary Hearing phase and now trial phase. Two separate accounts were created. The $$ that was in the original PH IOLTA account was not used and I want to be able to move it to the other account. Is this possible, and if so, how can it be done?