Document new GQLSTATUS 22NB9

modules/ROOT/content-nav.adoc

@@ -150,6 +150,7 @@
 **** xref:errors/gql-errors/22NB6.adoc[]
 **** xref:errors/gql-errors/22NB7.adoc[]
 **** xref:errors/gql-errors/22NB8.adoc[]
+**** xref:errors/gql-errors/22NB9.adoc[]
 *** xref:errors/gql-errors/index.adoc#invalid-transaction-state[Invalid transaction state]
 **** xref:errors/gql-errors/25G02.adoc[]
 **** xref:errors/gql-errors/25N01.adoc[]

modules/ROOT/pages/errors/gql-errors/22N90.adoc

@@ -1,7 +1,8 @@
+:page-role: changed-2025.05
 = 22N90
 
 == Status description
-error: data exception - property type unsupported in constraint. `{ <<item>> }` is not supported in property type constraints.
+error: data exception - property type unsupported in constraint. `{ <<valueType>> }` is not supported in property type constraints.
 
 ifndef::backend-pdf[]
 [discrete.glossary]

modules/ROOT/pages/errors/gql-errors/22NB9.adoc

@@ -0,0 +1,33 @@
+= 22NB9
+
+== Status description
+
+error: data exception - invalid inner list type. Lists cannot have `{ <<typeDescription>> }` as an inner type in this context.
+
+== Example scenario
+
+For example, try to create a property type constraint with a list of a union as property type:
+
+[source,cypher]
+----
+CREATE CONSTRAINT myConstraint
+FOR (n:Label)
+REQUIRE n.prop IS :: LIST<INTEGER NOT NULL | FLOAT NOT NULL>
+----
+
+You will receive an error with GQLSTATUS xref:errors/gql-errors/50N11.adoc[50N11].
+This error has a cause detailed in xref:errors/gql-errors/22N90.adoc[22N90], which also has a subsequent cause with GQLSTATUS 22NB9 and status description:
+
+
+[source]
+----
+error: data exception - invalid inner list type. Lists cannot have a union of types as an inner type in this context.
+----
+
+
+ifndef::backend-pdf[]
+[discrete.glossary]
+== Glossary
+
+include::partial$glossary.adoc[]
+endif::[]

modules/ROOT/pages/errors/gql-errors/index.adoc

@@ -606,6 +606,10 @@ Status description:: error: data exception - element id unsupported on composite
 
 Status description:: error: data exception - invalid Neo4j type. `{ <<input>> }` is not a recognized Neo4j type.
 
+=== xref:errors/gql-errors/22NB9.adoc[22NB9]
+
+Status description:: error: data exception - invalid inner list type. Lists cannot have `{ <<item>> }` as an inner type in this context.
+
 
 [[invalid-transaction-state]]
 == Invalid transaction state

modules/ROOT/partials/glossary.adoc

@@ -123,6 +123,7 @@
 [[tokenId]]$tokenId:: Token ID.
 [[tokenType]]$tokenType:: One of a label, a relationship type, or a property key.
 [[transactionId]]$transactionId:: The transaction ID of a running query.
+[[typeDescription]]$typeDescription:: Freeform description of a type e.g. 'a list'.
 [[upper]]$upper:: The highest accepted number of a range.
 [[url]]$url:: A URL, for example, https://example.com.
 [[user]]$user:: A user name, for example, `neo4j`.