YGY-001 opened a new issue, #2539:
URL: https://github.com/apache/age/issues/2539
Docker image `apache/age:release_PG18_1.7.0`.
**Reproduction**
```sql
LOAD 'age';
SET search_path = ag_catalog, public;
SELECT ag_catalog.create_graph('age_issue_case13');
SELECT *
FROM ag_catalog.cypher('age_issue_case13', $$
CREATE (c {id: 1001})-[:rt13]->(a {id: 1002})
$$) AS (v agtype);
SELECT *
FROM ag_catalog.cypher('age_issue_case13', $$
MATCH (c {id: 1001})
CREATE (c)-[:rt13]->(b {id: 1003})
$$) AS (v agtype);
SELECT *
FROM ag_catalog.cypher('age_issue_case13', $$
UNWIND [1] AS i
MATCH p = ()-[:rt13*..6]-(n)
DETACH DELETE n
RETURN i
$$) AS (i agtype);
```
**Expected**
The query completes and returns the scalar `i` for each matched path row.
Deleting the matched vertices must not make the scalar-only `RETURN` fail.
**Actual**
Apache AGE `1.7.0` reports an internal executor error instead of returning
the rows:
```text
ERROR: add_valid_vertex_edges: no vertex found
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