Removing didn't work. But I open RA, copied the supported hash, pasted it in this field, and it worked! I specifically checked it by earning an achievement for this game. Thanks for giving me the idea!
Yes, in the Sony PSP.xml, the game was assigned #7093. I have now changed it to #6799. Almost nothing has changed. However, the correct # is now displayed in the editor window.
Yes, clicking on link #7093 takes me to page #6799.
Answering an unasked question in advance, my ROM has a supported hash. When I launch the game, the emulator (RetroArch) identifies it as supported.
When adding the LittleBigPlanet game for PSP, the auto-search assigns it the ID #7093. However, the game actually has the ID #6799. This is likely the reason why the game's retro achievements are not displayed. Can you please advise on what I should do to ensure that the game is assigned the correct ID?