My understanding is that your initial licence issue has to be in the same state as its medical. Once it's all been issued then the whole lot (medical and licence) can be changed to a different SOLI (subject to a whole bunch of verifications). From where you are now it seems that your choices are to complete the Polish licence and then change SOLI or start again with IAA initial medical. I can't find a route to change the initial medical to a new state prior to completing a licence - this doesn't mean that there isn't a method, just that I can't find one. My own experience with the IAA is of slow responses to queries. As always, happy to be corrected.
https://www.iaa.ie/personnel-licensi...ansfer-process
This is the bit about change of SOLI - ignore the top bit which is UK centric. Good luck and keep looking