diff --git a/Geometry/MTDCommonData/python/defaultMTDConditionsEra_cff.py b/Geometry/MTDCommonData/python/defaultMTDConditionsEra_cff.py
index c4d7d37caa3dd..4e45937c49867 100644
--- a/Geometry/MTDCommonData/python/defaultMTDConditionsEra_cff.py
+++ b/Geometry/MTDCommonData/python/defaultMTDConditionsEra_cff.py
@@ -1,6 +1,6 @@
 import Configuration.Geometry.defaultPhase2ConditionsEra_cff as _centralgeo
 
-MTD_DEFAULT_VERSION = "Run4D110"
+MTD_DEFAULT_VERSION = "Run4D121"
 
 def check_mtdgeo():
     if MTD_DEFAULT_VERSION != _centralgeo.DEFAULT_VERSION: