diff --git a/logging/rtc_event_log/encoder/rtc_event_log_encoder_new_format.cc b/logging/rtc_event_log/encoder/rtc_event_log_encoder_new_format.cc
index a5cd177fb6..79dc379f48 100644
--- a/logging/rtc_event_log/encoder/rtc_event_log_encoder_new_format.cc
+++ b/logging/rtc_event_log/encoder/rtc_event_log_encoder_new_format.cc
@@ -1023,8 +1023,6 @@ void RtcEventLogEncoderNewFormat::EncodeAudioRecvStreamConfig(
     proto_batch->set_timestamp_ms(base_event->timestamp_ms());
     proto_batch->set_remote_ssrc(base_event->config().remote_ssrc);
     proto_batch->set_local_ssrc(base_event->config().local_ssrc);
-    if (!base_event->config().rsid.empty())
-      proto_batch->set_rsid(base_event->config().rsid);
 
     rtclog2::RtpHeaderExtensionConfig* proto_config =
         proto_batch->mutable_header_extensions();
@@ -1043,8 +1041,6 @@ void RtcEventLogEncoderNewFormat::EncodeAudioSendStreamConfig(
         event_stream->add_audio_send_stream_configs();
     proto_batch->set_timestamp_ms(base_event->timestamp_ms());
     proto_batch->set_ssrc(base_event->config().local_ssrc);
-    if (!base_event->config().rsid.empty())
-      proto_batch->set_rsid(base_event->config().rsid);
 
     rtclog2::RtpHeaderExtensionConfig* proto_config =
         proto_batch->mutable_header_extensions();
@@ -1264,8 +1260,6 @@ void RtcEventLogEncoderNewFormat::EncodeVideoRecvStreamConfig(
     proto_batch->set_remote_ssrc(base_event->config().remote_ssrc);
     proto_batch->set_local_ssrc(base_event->config().local_ssrc);
     proto_batch->set_rtx_ssrc(base_event->config().rtx_ssrc);
-    if (!base_event->config().rsid.empty())
-      proto_batch->set_rsid(base_event->config().rsid);
 
     rtclog2::RtpHeaderExtensionConfig* proto_config =
         proto_batch->mutable_header_extensions();
@@ -1285,8 +1279,6 @@ void RtcEventLogEncoderNewFormat::EncodeVideoSendStreamConfig(
     proto_batch->set_timestamp_ms(base_event->timestamp_ms());
     proto_batch->set_ssrc(base_event->config().local_ssrc);
     proto_batch->set_rtx_ssrc(base_event->config().rtx_ssrc);
-    if (!base_event->config().rsid.empty())
-      proto_batch->set_rsid(base_event->config().rsid);
 
     rtclog2::RtpHeaderExtensionConfig* proto_config =
         proto_batch->mutable_header_extensions();
diff --git a/logging/rtc_event_log/rtc_event_log2.proto b/logging/rtc_event_log/rtc_event_log2.proto
index adaefd64cf..995853b565 100644
--- a/logging/rtc_event_log/rtc_event_log2.proto
+++ b/logging/rtc_event_log/rtc_event_log2.proto
@@ -321,12 +321,9 @@ message VideoRecvStreamConfig {
   // optional - required if RTX is configured. SSRC for the RTX stream.
   optional uint32 rtx_ssrc = 4;
 
-  // optional - RTP source stream ID
-  optional bytes rsid = 5;
-
   // IDs for the header extension we care about. Only required if there are
   // header extensions configured.
-  optional RtpHeaderExtensionConfig header_extensions = 6;
+  optional RtpHeaderExtensionConfig header_extensions = 5;
 
   // TODO(terelius): Do we need codec-payload mapping? If so and rtx_ssrc is
   // used, we also need a map between RTP payload type and RTX payload type.
@@ -343,12 +340,9 @@ message VideoSendStreamConfig {
   // optional - required if RTX is configured. SSRC for the RTX stream.
   optional uint32 rtx_ssrc = 3;
 
-  // optional - RTP source stream ID
-  optional bytes rsid = 4;
-
   // IDs for the header extension we care about. Only required if there are
   // header extensions configured.
-  optional RtpHeaderExtensionConfig header_extensions = 5;
+  optional RtpHeaderExtensionConfig header_extensions = 4;
 
   // TODO(terelius): Do we need codec-payload mapping? If so and rtx_ssrc is
   // used, we also need a map between RTP payload type and RTX payload type.
@@ -366,12 +360,9 @@ message AudioRecvStreamConfig {
 
   // Field number 4 reserved for RTX SSRC.
 
-  // optional - RTP source stream ID.
-  optional bytes rsid = 5;
-
   // IDs for the header extension we care about. Only required if there are
   // header extensions configured.
-  optional RtpHeaderExtensionConfig header_extensions = 6;
+  optional RtpHeaderExtensionConfig header_extensions = 5;
 
   // TODO(terelius): Do we need codec-payload mapping? If so and rtx_ssrc is
   // used, we also need a map between RTP payload type and RTX payload type.
@@ -384,14 +375,11 @@ message AudioSendStreamConfig {
   // required - Synchronization source (stream identifier) for outgoing stream.
   optional uint32 ssrc = 2;
 
-  // Field number 3 reserved for RTX SSRC
-
-  // optional - RTP source stream ID
-  optional bytes rsid = 4;
+  // Field number 3 reserved for RTX SSRC.
 
   // IDs for the header extension we care about. Only required if there are
   // header extensions configured.
-  optional RtpHeaderExtensionConfig header_extensions = 5;
+  optional RtpHeaderExtensionConfig header_extensions = 4;
 
   // TODO(terelius): Do we need codec-payload mapping? If so and rtx_ssrc is
   // used, we also need a map between RTP payload type and RTX payload type.
diff --git a/logging/rtc_event_log/rtc_event_log_parser_new.cc b/logging/rtc_event_log/rtc_event_log_parser_new.cc
index cadea745f9..7278ea18b1 100644
--- a/logging/rtc_event_log/rtc_event_log_parser_new.cc
+++ b/logging/rtc_event_log/rtc_event_log_parser_new.cc
@@ -2358,9 +2358,6 @@ void ParsedRtcEventLogNew::StoreVideoRecvConfig(
   if (proto.has_rtx_ssrc()) {
     stream.config.rtx_ssrc = proto.rtx_ssrc();
   }
-  if (proto.has_rsid()) {
-    stream.config.rsid = proto.rsid();
-  }
   if (proto.has_header_extensions()) {
     stream.config.rtp_extensions =
         GetRuntimeRtpHeaderExtensionConfig(proto.header_extensions());
@@ -2379,9 +2376,6 @@ void ParsedRtcEventLogNew::StoreVideoSendConfig(
   if (proto.has_rtx_ssrc()) {
     config.rtx_ssrc = proto.rtx_ssrc();
   }
-  if (proto.has_rsid()) {
-    config.rsid = proto.rsid();
-  }
   if (proto.has_header_extensions()) {
     config.rtp_extensions =
         GetRuntimeRtpHeaderExtensionConfig(proto.header_extensions());
@@ -2399,9 +2393,6 @@ void ParsedRtcEventLogNew::StoreAudioRecvConfig(
   stream.config.remote_ssrc = proto.remote_ssrc();
   RTC_CHECK(proto.has_local_ssrc());
   stream.config.local_ssrc = proto.local_ssrc();
-  if (proto.has_rsid()) {
-    stream.config.rsid = proto.rsid();
-  }
   if (proto.has_header_extensions()) {
     stream.config.rtp_extensions =
         GetRuntimeRtpHeaderExtensionConfig(proto.header_extensions());
@@ -2416,9 +2407,6 @@ void ParsedRtcEventLogNew::StoreAudioSendConfig(
   stream.timestamp_us = proto.timestamp_ms() * 1000;
   RTC_CHECK(proto.has_ssrc());
   stream.config.local_ssrc = proto.ssrc();
-  if (proto.has_rsid()) {
-    stream.config.rsid = proto.rsid();
-  }
   if (proto.has_header_extensions()) {
     stream.config.rtp_extensions =
         GetRuntimeRtpHeaderExtensionConfig(proto.header_extensions());
diff --git a/logging/rtc_event_log/rtc_event_log_unittest_helper.cc b/logging/rtc_event_log/rtc_event_log_unittest_helper.cc
index a0c5d3205c..e87808d125 100644
--- a/logging/rtc_event_log/rtc_event_log_unittest_helper.cc
+++ b/logging/rtc_event_log/rtc_event_log_unittest_helper.cc
@@ -762,7 +762,6 @@ void VerifyLoggedStreamConfig(const rtclog::StreamConfig& original_config,
   EXPECT_EQ(original_config.local_ssrc, logged_config.local_ssrc);
   EXPECT_EQ(original_config.remote_ssrc, logged_config.remote_ssrc);
   EXPECT_EQ(original_config.rtx_ssrc, logged_config.rtx_ssrc);
-  EXPECT_EQ(original_config.rsid, logged_config.rsid);
 
   EXPECT_EQ(original_config.rtp_extensions.size(),
             logged_config.rtp_extensions.size());