YGY-001 opened a new issue, #2538:
URL: https://github.com/apache/age/issues/2538
Environment: Apache AGE `1.7.0`, PostgreSQL `18.1`, image
## Reproduction
```cypher
CREATE (n {id: 1})
WITH n AS alias0
MATCH (alias0)
RETURN alias0
```
Observed error:
```text
ERROR: variable 'alias0' already exists
```
The same error occurs after a second boundary:
```cypher
CREATE (n {id: 1})
WITH n AS alias0
WITH alias0
MATCH (alias0)
RETURN alias0
```
The two renamed-alias queries both produced the existing-variable error. The
control query below succeeded and returned the created vertex:
```cypher
CREATE (n {id: 4})
WITH n
MATCH (n)
RETURN n
```
Therefore this is not a generic prohibition on reusing an already-bound
pattern variable. The failure is specific to the entity projection alias.
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