diff --git a/Configuration/PyReleaseValidation/python/relval_steps.py b/Configuration/PyReleaseValidation/python/relval_steps.py
index f8685faeadcb4..3c0ac283e2dcf 100644
--- a/Configuration/PyReleaseValidation/python/relval_steps.py
+++ b/Configuration/PyReleaseValidation/python/relval_steps.py
@@ -200,7 +200,6 @@ def gen2015(fragment,howMuch):
 steps['SMS-T1tttt_mGl-1500_mLSP-100_13']=gen2015('SMS-T1tttt_mGl-1500_mLSP-100_13TeV-pythia8_cfi',Kby(9,50))
 steps['QCD_FlatPt_15_3000_13']=gen2015('QCDForPF_13TeV_TuneCUETP8M1_cfi',Kby(9,100))
 steps['QCD_FlatPt_15_3000HS_13']=gen2015('QCDForPF_13TeV_TuneCUETP8M1_cfi',Kby(50,100))
-steps['DisplacedSUSY_stopToBottom_M_300_1000mm_13']=gen2015('DisplacedSUSY_stopToBottom_M_300_1000mm_TuneCUETP8M1_13TeV_pythia8_cff',Kby(9,100))
 
 steps['ZpMM_2250_8TeV']=gen('ZpMM_2250_8TeV_TuneCUETP8M1_cfi',Kby(9,100))
 steps['ZpEE_2250_8TeV']=gen('ZpEE_2250_8TeV_TuneCUETP8M1_cfi',Kby(9,100))
@@ -231,7 +230,8 @@ def identitySim(wf):
     'CMSSW_7_5_0_pre6-PU25ns_75X_mcRun2_asymptotic_v1-v1',  # 5 - fullSim PU 25ns premix
     'CMSSW_7_5_0_pre6-PU50ns_75X_mcRun2_startup_v1-v1',     # 6 - fullSim PU 50ns premix
     'CMSSW_7_5_0_pre6-75X_mcRun2_asymptotic_v1_FastSim-v1', # 7 - fastSim premix
-    'CMSSW_7_5_0_pre6-75X_mcRun2_HeavyIon_v1-v1'            # 8 Run2 HI GEN-SIM
+    'CMSSW_7_5_0_pre5-MCRUN2_75_V5_FastSim-v1',             # 8 - fastSim mb
+    'CMSSW_7_5_0_pre4-PU25ns_MCRUN2_75_V1_FastSim-v2'       # 9 - fastSim pre-premix 
     ]
 
 # note: INPUT commands to be added once GEN-SIM w/ 13TeV+PostLS1Geo will be available 
@@ -542,7 +542,6 @@ def genS(fragment,howMuch):
         {"cfg":"SingleNuE10_cfi",
          "--fast":"",
          "--conditions":"auto:run2_mc",
-         "--magField":"38T_PostLS1",
          "-s":"GEN,SIM,RECOBEFMIX,DIGIPREMIX,L1,DIGI2RAW",
          "--eventcontent":"PREMIX",
          "--datatier":"GEN-SIM-DIGI-RAW",
@@ -894,7 +893,6 @@ def identityFS(wf):
     '-s':'RAW2DIGI,L1Reco,RECO,EI,PAT,VALIDATION:@standardValidation+@miniAODValidation,DQM:@standardDQM+@miniAODDQM',
     '--runUnscheduled':'',
     '--conditions':'auto:run2_mc', 
-    '--magField'    : '38T_PostLS1',
     '-n':'10',
     '--datatier':'GEN-SIM-RECO,MINIAODSIM,DQMIO',
     '--eventcontent':'RECOSIM,MINIAODSIM,DQM',
@@ -1146,7 +1144,6 @@ def identityFS(wf):
     # '-s':'HARVESTING:validationHarvesting+dqmHarvesting', # todo: remove UP from label
     '-s':'HARVESTING:@standardValidation+@standardDQM+@miniAODValidation+@miniAODDQM', # todo: remove UP from label
     '--conditions':'auto:run2_mc', 
-    '--magField'    : '38T_PostLS1',
     '--mc':'',
     '--customise' : 'SLHCUpgradeSimulations/Configuration/postLS1Customs.customisePostLS1',
     '--filetype':'DQM',