diff --git a/src/cc/assets.cpp b/src/cc/assets.cpp
index 968659470..6aae09dd3 100644
--- a/src/cc/assets.cpp
+++ b/src/cc/assets.cpp
@@ -146,7 +146,11 @@ bool AssetsValidate(struct CCcontract_info *cpAssets,Eval* eval,const CTransacti
     outputs = inputs = 0;
     preventCCvins = preventCCvouts = -1;
 
-    if (strcmp(ASSETCHAINS_SYMBOL, "SEC") == 0 && chainActive.Height() < 144073)
+    // add specific chains exceptions for old token support:
+    if (strcmp(ASSETCHAINS_SYMBOL, "SEC") == 0 && chainActive.Height() <= 144073)
+        return true;
+
+    if (strcmp(ASSETCHAINS_SYMBOL, "MGNX") == 0 && chainActive.Height() <= 210190)
         return true;
 
 	if (numvouts == 0)