Audio not in sync after converting sample rate

Hi, I converted my old project from 44.1 to 48 sample rate and realized that after conversion all the recorded audio tracks are now out of sync compared to the correct tempo. They are playing way slower than before. I have not been able to figure out how to fix this.
All the files in the pool are showing correct 48 sample rate which is same as the record file format in the project setup.
I have done this before without any issues…
Any ideas how I can fix this and save the project?