diff --git a/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref b/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
index 18b41e35da0d0fa1bc0fc18e6312574caa212701..319409b8327d224e2b0fdc8cef128982024e80bc 100644
--- a/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
+++ b/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
@@ -757,6 +757,9 @@ TrigSignatureMoniMT INFO -- #2803198799 Features
TrigSignatureMoniMT INFO HLT_xe100_trkmht_L1XE50 #1055916731
TrigSignatureMoniMT INFO -- #1055916731 Events 10 10 0 0 0 0 0 0 0 0 0 0 7 - 7
TrigSignatureMoniMT INFO -- #1055916731 Features 0 0 0 0 0 0 0 0 0 0 7 -
+TrigSignatureMoniMT INFO HLT_xe100_trkmht_xe85_tcpufit_xe65_cell_L1XE50 #451622546
+TrigSignatureMoniMT INFO -- #451622546 Events 10 10 0 0 0 0 0 0 0 0 0 0 6 - 6
+TrigSignatureMoniMT INFO -- #451622546 Features 0 0 0 0 0 0 0 0 0 0 6 -
TrigSignatureMoniMT INFO HLT_xe110_mht_L1XE50 #3030733259
TrigSignatureMoniMT INFO -- #3030733259 Events 10 10 0 0 0 0 0 0 0 0 0 0 6 - 6
TrigSignatureMoniMT INFO -- #3030733259 Features 0 0 0 0 0 0 0 0 0 0 6 -
@@ -802,3 +805,6 @@ TrigSignatureMoniMT INFO -- #531141817 Features
TrigSignatureMoniMT INFO HLT_xe65_cell_xe110_tcpufit_L1XE50 #115518400
TrigSignatureMoniMT INFO -- #115518400 Events 10 10 0 0 0 0 0 0 0 0 0 0 5 - 5
TrigSignatureMoniMT INFO -- #115518400 Features 0 0 0 0 0 0 0 0 0 0 5 -
+TrigSignatureMoniMT INFO HLT_xe95_trkmht_xe90_tcpufit_xe75_cell_L1XE50 #302256132
+TrigSignatureMoniMT INFO -- #302256132 Events 10 10 0 0 0 0 0 0 0 0 0 0 4 - 4
+TrigSignatureMoniMT INFO -- #302256132 Features 0 0 0 0 0 0 0 0 0 0 4 -
diff --git a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
index 5f3fabea7793de863fba9a7abb651e8207ef1279..54971693bd414a559162f39863723c93c7765e5e 100644
--- a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
+++ b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
@@ -757,6 +757,9 @@ TrigSignatureMoniMT INFO -- #2803198799 Features
TrigSignatureMoniMT INFO HLT_xe100_trkmht_L1XE50 #1055916731
TrigSignatureMoniMT INFO -- #1055916731 Events 20 20 0 0 0 0 0 0 0 0 0 0 1 - 1
TrigSignatureMoniMT INFO -- #1055916731 Features 0 0 0 0 0 0 0 0 0 0 1 -
+TrigSignatureMoniMT INFO HLT_xe100_trkmht_xe85_tcpufit_xe65_cell_L1XE50 #451622546
+TrigSignatureMoniMT INFO -- #451622546 Events 20 20 0 0 0 0 0 0 0 0 0 0 0 - 0
+TrigSignatureMoniMT INFO -- #451622546 Features 0 0 0 0 0 0 0 0 0 0 0 -
TrigSignatureMoniMT INFO HLT_xe110_mht_L1XE50 #3030733259
TrigSignatureMoniMT INFO -- #3030733259 Events 20 20 0 0 0 0 0 0 0 0 0 0 1 - 1
TrigSignatureMoniMT INFO -- #3030733259 Features 0 0 0 0 0 0 0 0 0 0 1 -
@@ -802,3 +805,6 @@ TrigSignatureMoniMT INFO -- #531141817 Features
TrigSignatureMoniMT INFO HLT_xe65_cell_xe110_tcpufit_L1XE50 #115518400
TrigSignatureMoniMT INFO -- #115518400 Events 20 20 0 0 0 0 0 0 0 0 0 0 0 - 0
TrigSignatureMoniMT INFO -- #115518400 Features 0 0 0 0 0 0 0 0 0 0 0 -
+TrigSignatureMoniMT INFO HLT_xe95_trkmht_xe90_tcpufit_xe75_cell_L1XE50 #302256132
+TrigSignatureMoniMT INFO -- #302256132 Events 20 20 0 0 0 0 0 0 0 0 0 0 0 - 0
+TrigSignatureMoniMT INFO -- #302256132 Features 0 0 0 0 0 0 0 0 0 0 0 -
diff --git a/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py b/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
index ab3082aae6f1e0933ca35d684f537991d187c7ae..f4277da4be0c5d3b6fb45ed01c86c4451079a295 100644
--- a/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
+++ b/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
@@ -172,6 +172,9 @@ def setupMenu():
ChainProp(name='HLT_xe110_tcpufit_L1XE50', groups=SingleMETGroup),
# MultiMET Chain
ChainProp(name='HLT_xe30_cell_xe30_tcpufit_L1XE10', l1SeedThresholds=['XE10']*2, groups=MultiMETGroup), #must be FS seeded
+ # ATR-21934
+ ChainProp(name='HLT_xe100_trkmht_xe85_tcpufit_xe65_cell_L1XE50',l1SeedThresholds=['XE50']*3, mergingStrategy='parallel', groups=MultiMETGroup),
+ ChainProp(name='HLT_xe95_trkmht_xe90_tcpufit_xe75_cell_L1XE50', l1SeedThresholds=['XE50']*3, mergingStrategy='parallel', groups=MultiMETGroup),
]
TriggerFlags.JetSlice.signatures = TriggerFlags.JetSlice.signatures() + [