Concept

When you use multilanguage site, you could use associations for menuitems, contents...

Issue

When you setup associations between elements and then delete elements, associations table is not purged.
Dunno if this a real issue, but with many elements this table could be really filled. Moreover, this associations persist in table.

Test

• Create 2 articles with 2 languages different.
• Associate them.
• In your database you will see 2 line in "#__associations" table, example:

id  context         key
1   com_content.item    9d603efd64821ea52e1c1921cee55305
2   com_content.item    9d603efd64821ea52e1c1921cee55305

• Remove 1 article.
• In your database, table "associations", same lines as before.

Last

I know this could be fixed by a cron task script, but this is for developper, did we need to add something to handle that (plugin ?).