diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 282cb37d514f..d14450f87d9f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -1499,6 +1499,10 @@ class Analyzer(override val catalogManager: CatalogManager)
             .nonEmpty =>
           Seq((oldVersion, oldVersion.copy(windowExpressions = newAliases(windowExpressions))))
 
+        case oldVersion @ ScriptTransformation(_, _, output, _, _)
+            if AttributeSet(output).intersect(conflictingAttributes).nonEmpty =>
+          Seq((oldVersion, oldVersion.copy(output = output.map(_.newInstance()))))
+
         case _ => plan.children.flatMap(collectConflictPlans)
       }
 
diff --git a/sql/core/src/test/resources/sql-tests/inputs/transform.sql b/sql/core/src/test/resources/sql-tests/inputs/transform.sql
index 3f39700a9591..bfb2474eb4ae 100644
--- a/sql/core/src/test/resources/sql-tests/inputs/transform.sql
+++ b/sql/core/src/test/resources/sql-tests/inputs/transform.sql
@@ -183,3 +183,9 @@ SELECT a, b, decode(c, 'UTF-8'), d, e, f, g, h, i, j, k, l FROM (
     NULL DEFINED AS 'NULL'
   FROM t
 ) tmp;
+
+-- SPARK-34634: self join using CTE contains transform
+WITH temp AS (
+  SELECT TRANSFORM(a) USING 'cat' AS (b string) FROM t
+)
+SELECT t1.b FROM temp t1 JOIN temp t2 ON t1.b = t2.b
diff --git a/sql/core/src/test/resources/sql-tests/results/transform.sql.out b/sql/core/src/test/resources/sql-tests/results/transform.sql.out
index 3267a7625a7d..16cab8ab495a 100644
--- a/sql/core/src/test/resources/sql-tests/results/transform.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/transform.sql.out
@@ -1,5 +1,5 @@
 -- Automatically generated by SQLQueryTestSuite
--- Number of queries: 16
+-- Number of queries: 17
 
 
 -- !query
@@ -333,3 +333,16 @@ SELECT a, b, decode(c, 'UTF-8'), d, e, f, g, h, i, j, k, l FROM (
     NULL DEFINED AS 'NULL'
   FROM t
 ) tmp
+
+
+-- !query
+WITH temp AS (
+  SELECT TRANSFORM(a) USING 'cat' AS (b string) FROM t
+)
+SELECT t1.b FROM temp t1 JOIN temp t2 ON t1.b = t2.b
+-- !query schema
+struct<b:string>
+-- !query output
+1
+2
+3