diff --git a/.github/trigger_files/beam_PostCommit_Java_ValidatesRunner_ULR.json b/.github/trigger_files/beam_PostCommit_Java_ValidatesRunner_ULR.json
index 6e2f429dd24e..6f76381dda92 100644
--- a/.github/trigger_files/beam_PostCommit_Java_ValidatesRunner_ULR.json
+++ b/.github/trigger_files/beam_PostCommit_Java_ValidatesRunner_ULR.json
@@ -1,6 +1,6 @@
 {
   "https://github.com/apache/beam/pull/34902": "Introducing OutputBuilder",
-  "comment": "Modify this file in a trivial way to cause this test suite to run",
+  "comment": "Modify this file in a trivial way to cause this test suite to run 2",
   "https://github.com/apache/beam/pull/31156": "noting that PR #31156 should run this test",
   "https://github.com/apache/beam/pull/35159": "moving WindowedValue and making an interface"
 }
diff --git a/sdks/java/core/src/main/java/org/apache/beam/sdk/util/construction/ModelCoderRegistrar.java b/sdks/java/core/src/main/java/org/apache/beam/sdk/util/construction/ModelCoderRegistrar.java
index 1f9f1eaafbed..eb92f195112c 100644
--- a/sdks/java/core/src/main/java/org/apache/beam/sdk/util/construction/ModelCoderRegistrar.java
+++ b/sdks/java/core/src/main/java/org/apache/beam/sdk/util/construction/ModelCoderRegistrar.java
@@ -35,7 +35,6 @@
 import org.apache.beam.sdk.coders.TimestampPrefixingWindowCoder;
 import org.apache.beam.sdk.coders.VarLongCoder;
 import org.apache.beam.sdk.options.PipelineOptions;
-import org.apache.beam.sdk.options.StreamingOptions;
 import org.apache.beam.sdk.schemas.SchemaCoder;
 import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
 import org.apache.beam.sdk.transforms.windowing.IntervalWindow.IntervalWindowCoder;
@@ -140,8 +139,11 @@ public Map<Class<? extends Coder>, CoderTranslator<? extends Coder>> getCoderTra
 
   @Override
   public boolean isKnownCoder(Coder<?> coder, PipelineOptions options) {
-    if (coder.getClass() == SchemaCoder.class
-        && StreamingOptions.updateCompatibilityVersionLessThan(options, "2.74")) {
+    if (coder.getClass() == SchemaCoder.class) {
+      // Don't emit beam:coder:schema:v1 yet: its payload carries Java-only
+      // blobs and no other SDK can decode it, so cross-SDK runners like the
+      // Python ULR break. Fall back to the legacy custom coder encoding
+      // until other SDKs add support (#33859).
       return false;
     }
     return BEAM_MODEL_CODER_URNS.containsKey(coder.getClass());