diff --git a/scripts/utils/migrate_mcumgr_kconfigs.py b/scripts/utils/migrate_mcumgr_kconfigs.py
index 5ce41d7b71..b2ca14e332 100644
--- a/scripts/utils/migrate_mcumgr_kconfigs.py
+++ b/scripts/utils/migrate_mcumgr_kconfigs.py
@@ -54,7 +54,6 @@ REPLACEMENTS = {
     "IMG_MGMT_USE_HEAP_FOR_FLASH_IMG_CONTEXT" : "MCUMGR_GRP_IMG_USE_HEAP_FOR_FLASH_IMG_CONTEXT",
     "IMG_MGMT_UPDATABLE_IMAGE_NUMBER" : "MCUMGR_GRP_IMG_UPDATABLE_IMAGE_NUMBER",
     "IMG_MGMT_VERBOSE_ERR" : "MCUMGR_GRP_IMG_VERBOSE_ERR",
-    "IMG_MGMT_DUMMY_HDR" : "MCUMGR_GRP_IMG_DUMMY_HDR",
     "IMG_MGMT_DIRECT_IMAGE_UPLOAD" : "MCUMGR_GRP_IMG_DIRECT_UPLOAD",
     "IMG_MGMT_REJECT_DIRECT_XIP_MISMATCHED_SLOT" : "MCUMGR_GRP_IMG_REJECT_DIRECT_XIP_MISMATCHED_SLOT",
     "IMG_MGMT_FRUGAL_LIST" : "MCUMGR_GRP_IMG_FRUGAL_LIST",