I have run into a weird issue with PCM22 and both Lachi's and the Fast Editor where starting at some point every season, I can neither overwrite the existing savegame nor create a new .cdb file after having made changes.
Being in the middle of a nearly decade-long career at the moment, it appears the date from which this problem occurs on shifts to an earlier point every season.
In season 1, it only happens very late in September/October, while now in 2030, I'm already unable to make any savegame changes in late June.
Therefore, I assume this has something to do with savegame file size, as that increases throughout a season and every season start, the initial file size is bigger than at the previos season start.
Judging by my weekly saves folder, the critical file size might be around 7mb.
Am I thinking correctly here, and does anyone have a solution for this problem, be it a different editor or ways to decrease savegame file size beyond simple means like deleting emails?
I think I remember somebody else posting about this issue and I don't think he found a solution and pretty sure my suggestions below didn't work.
But . . . .
Have you tried the full/advanced editor? The full editor stores each table as a standalone xml file so you can edit them in excel if needed, and then just rebuild the cdb in the editor. But not sure if that editor will handle big file sizes any better.
If you delete a lot of the palmares and then save does it work? I think that table drives a lot of the size and isn't essential to game mechanics. This should bring down file size and at least test that theory. You lose the history but at least that would tell you if that was the problem. Then you could figure out what you are willing to delete.
During the season the tables that store the current season stage results are a big piece of the size, potentially could delete some of that, like results > 50, but not sure what that would do.
The thing that makes me question the size theory is that you are already unable to edit stuff late in season 1 but then it's possible again in earlier parts of following seasons. Or are there parts of the save file that the game erases at the end of the season?
What you could also try is use the PCM DBEdit from https://davydepuydt.com/. It's a more recent editor, maybe that works more reliably. Also, just to make sure, do you try to edit the same things when it works early in the season and when it doesn't later on? I'm asking because the editor doesn't create new cdb files when the edit is faulty, like when there are cells missing in added rows that shouldn't be missing. From the way you describe it, I assume that's not the problem, but like I said, just to make sure.