diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
index 9e1e0d5d5f958..f474f0f0b4309 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
@@ -3327,24 +3327,15 @@ object SQLConf {
       .doc("State format version used by streaming join operations in a streaming query. " +
         "State between versions are tend to be incompatible, so state format version shouldn't " +
         "be modified after running. Version 3 uses a single state store with virtual column " +
-        "families instead of four stores and is only supported with RocksDB. NOTE: version " +
-        "1 is DEPRECATED and should not be explicitly set by users. " +
-        "Version 4 is under development and only available for testing.")
+        "families instead of four stores and is only supported with RocksDB. Version 4 optimizes " +
+        "watermark-based eviction, also using a single state store with virtual " +
+        "column families and only supported with RocksDB. NOTE: version 1 is DEPRECATED and " +
+        "should not be explicitly set by users.")
       .version("3.0.0")
       .intConf
       .checkValue(v => Set(1, 2, 3, 4).contains(v), "Valid versions are 1, 2, 3, and 4")
       .createWithDefault(2)
 
-  val STREAMING_JOIN_STATE_FORMAT_V4_ENABLED =
-    buildConf("spark.sql.streaming.join.stateFormatV4.enabled")
-      .internal()
-      .doc("When true, enables state format version 4 for stream-stream joins. " +
-        "This config will be removed once V4 is complete.")
-      .version("4.2.0")
-      .withBindingPolicy(ConfigBindingPolicy.SESSION)
-      .booleanConf
-      .createWithDefaultFunction(() => Utils.isTesting)
-
   val STREAMING_SESSION_WINDOW_MERGE_SESSIONS_IN_LOCAL_PARTITION =
     buildConf("spark.sql.streaming.sessionWindow.merge.sessions.in.local.partition")
       .doc("When true, streaming session window sorts and merge sessions in local partition " +
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/operators/stateful/join/SymmetricHashJoinStateManager.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/operators/stateful/join/SymmetricHashJoinStateManager.scala
index 02c9ef11df89c..ea8fc861b1044 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/operators/stateful/join/SymmetricHashJoinStateManager.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/operators/stateful/join/SymmetricHashJoinStateManager.scala
@@ -2045,8 +2045,6 @@ object SymmetricHashJoinStateManager {
       joinStoreGenerator: JoinStateManagerStoreGenerator,
       joinKeyOrdinalForWatermark: Option[Int] = None): SymmetricHashJoinStateManager = {
     if (stateFormatVersion == 4) {
-      require(SQLConf.get.getConf(SQLConf.STREAMING_JOIN_STATE_FORMAT_V4_ENABLED),
-        "State format version 4 is under development.")
       new SymmetricHashJoinStateManagerV4(
         joinSide, inputValueAttributes, joinKeys, stateInfo, storeConf, hadoopConf,
         partitionId, keyToNumValuesStateStoreCkptId, keyWithIndexToValueStateStoreCkptId,