diff --git a/experiments/field_trials.py b/experiments/field_trials.py
index eb99b14877..2ffcbeb89d 100755
--- a/experiments/field_trials.py
+++ b/experiments/field_trials.py
@@ -105,9 +105,6 @@ ACTIVE_FIELD_TRIALS: FrozenSet[FieldTrial] = frozenset([
     FieldTrial('WebRTC-PermuteTlsClientHello',
                'webrtc:15467',
                date(2024, 7, 1)),
-    FieldTrial('WebRTC-PreventSsrcGroupsWithUnexpectedSize',
-               'chromium:1459124',
-               date(2024, 4, 1)),
     FieldTrial('WebRTC-ReceiveBufferSize',
                'webrtc:15585',
                date(2024, 4, 1)),
diff --git a/pc/sdp_offer_answer.cc b/pc/sdp_offer_answer.cc
index 95d54978c7..68d89e439f 100644
--- a/pc/sdp_offer_answer.cc
+++ b/pc/sdp_offer_answer.cc
@@ -3576,10 +3576,9 @@ RTCError SdpOfferAnswerHandler::ValidateSessionDescription(
     return error;
   }
 
-  // TODO(crbug.com/1459124): remove killswitch after rollout.
+  // Validate the SSRC groups.
   error = ValidateSsrcGroups(*sdesc->description());
-  if (!error.ok() &&
-      !pc_->trials().IsDisabled("WebRTC-PreventSsrcGroupsWithUnexpectedSize")) {
+  if (!error.ok()) {
     return error;
   }