that could be the solution More than this, for what I know, there's 7 leagues but you can add more, for example, 2 leagues can be "level 1" etc. (as used in original game with leagues in 2 groups, people making Lega Pro mods for example).That's right, everything grew in my hands. So the ID management for the clubs I have never taken care of "at the table" for the national teams, good or bad exploit the year with the ID (WC 1990, ID 1990) I covered most of the project. But with clubs I didn't think I'd get to where I am now. More than for tournaments it is for the management of Leagues and "Nations" (By "nations" I mean the container where 7 leagues are located) I thought of creating a "nation" for each season. Hence the 1995-96 nation contained 7 leagues. Serie A 1995-96, Premier 1995-96, La Liga 1995-96, Bunsesliga 1995-96, Division 1 1995-96, rest of the world 1995-96, and if desired Nationals 1995-96 (not qualified for Euro 96) or others club. This was the reform I was hoping to make. This is the reason that is pushing me to reform IDs. So we look for a way out and understand how to do this project. It could be revolutionary and open to thousands of teams depending on what one wants to do. A sort of starting engine, a supporting skeleton.
I have noticed some minor graphical advantage and disadvantage with those leagues/tournament ids.
For example, I wanted to assign domestic adboards to clubs (specificadboards_teamid) to be displayed on friendly and custom modes, avoiding having UCL graphics in each game mode. They work BUT you need to delete the files "specificadboards_0_0_leagueid.rx3, if you keep only the one linked to tournament (I think it's the "specificadboards_0_tournid_0 etc), then the teamspecific are displayed in friendly and the UCL ones in the corresponding ID tournament only!
This ID of leagues has another setback: (minor one) I wanted to add alternate kits and graphics for clubs teams 5 year (example San Lorenzo 2015-20 has kitset 2016 has base, and 2019 as alternate, but added as classic (this way I can San Lorenzo domestic liga argentina adboards to the club as team specific adboards, the liga argentina 2019 adboards as teamspecific adboard year..) But as the 2019, 2016 etc id are used by tournament, I had to add them as classic graphics year 1816/1817/1818/1819 etc...). While the CopaLibertadores adboards set is only added to specific tournament id, displaying only in South American clubs cup 15-20).
Another thing is the limit of nations, you could maybe run out of them, since some countries ids are deleted, with the chance of having players with nationality 1987-1988 instead of Jordan for example)