CREATE INDEX/UPDATE statements treats as field

CREATE default bucket

CREATE SCOPE default.s1;

CREATE COLLECTION default.s1.c1;

CREATE INDEX ix1 ON default.s1.c1(c1);

Reports as Index of 'self (near line 1, column 7)' is not allowed 

There is no self here.  FYI: The error is due to MB-51996, but underneath problem exist from long time and it  wrongly indexing.

The problem here is during formalization if expression is identifier matches with keyspace we are converting into self. That is wrong during DDL.