diff --git a/source/CaseStudies/Mg-Y_alloy/Mg-Y_alloy.md b/source/CaseStudies/Mg-Y_alloy/Mg-Y_alloy.md
index d99253a..0a333d9 100644
--- a/source/CaseStudies/Mg-Y_alloy/Mg-Y_alloy.md
+++ b/source/CaseStudies/Mg-Y_alloy/Mg-Y_alloy.md
@@ -2661,7 +2661,6 @@ The examplory files are attached: init_bulk param.json, run param.json. machine-
 
     "training" : {
      "systems":          [],
-     "set_prefix":       "set",
      "stop_batch":       600000,
      "batch_size":       1,
 
diff --git a/source/CaseStudies/Transfer-learning/Transfer-learning.md b/source/CaseStudies/Transfer-learning/Transfer-learning.md
index d5b9c19..5a6113a 100644
--- a/source/CaseStudies/Transfer-learning/Transfer-learning.md
+++ b/source/CaseStudies/Transfer-learning/Transfer-learning.md
@@ -114,7 +114,6 @@ Examplary "simplify.json" of Ag-Au system:
   "_comment": " traing controls",
   "training" : {
             "systems":      [],
-            "set_prefix":   "set",
             "stop_batch":   400000,
             "batch_size":   2,
             "seed":         1,