I believe this is a bug in the SA where it's entering empty values for private lists even when you don't create them - it's not a serious issue, just a house cleaning issue. You can't "delete" private lists that have been created. The info at the end of message 1381 (which you cut off) says you can fix that error by providing a name for the private list.
I believe the SA fixed this problem by not allowing blank names on lists after they had been created (lists are created once you give a "slot" a name or add one or more users, even if you remove them again).
1384 is just a warning. By default warnings are not even listed in dbWalker - this is not one to worry about.
But either way, 1381 is not a critical issue you need to worry too much about - You can give these lists names (probably list #1 for these users I'm guessing) and the error will no longer show up.