Photoshop 'Save' command keeps reverting the file name to the original

Hi everyone,

I am having a strange problem with Photoshop:

1. I import the RAW file from Lightroom (say "_869547-1234.DNG"),
2. I rename the file using the 'Save As' command (say "_869547-1234-HDR_a-1.PSD", same path), then
3. when I later use the 'Save' command , Photoshop just saves the file name with the original file name ("_869547-1234.PSD") but keeps the correct extension (as if I had never renamed it).
   
   The weird thing is that I can see there are now both files saved in folder (the "_869547-1234-HDR_a-1.PSD" I creat at point #2 and the "_869547-1234-HDR_a-1.PSD" one, created at point #3).

How can I fix this?

I use:

• Photoshop 26.0
• Lightroom Classic 14.0
• macOS Sonoma 14

I'd appreciate any help in fixing this annoying problem that forces me to go through the process at point @#2 every time I need to save the file to avoid the renaming problem.

Thank you in advance for your time.