Oracle Solution for Error ora-19147

ORA-19147: XQST0089: It is a static error if a variable bound in a for clause of a FLWOR expression, and its associated positional variable, do not have distinct names (expanded QNames)

What triggered the Error:

error occurred during the processing of the XQuery expression.

What should we do to fix it:

eck the detailed error message for the possible causes.