diff --git a/data/js/src/main/scala/sigma/Platform.scala b/data/js/src/main/scala/sigma/Platform.scala
index 45d74ea2b..2bc9995cd 100644
--- a/data/js/src/main/scala/sigma/Platform.scala
+++ b/data/js/src/main/scala/sigma/Platform.scala
@@ -14,23 +14,23 @@ object Platform {
   private[sigma] def liftToConstant(obj: Any, builder: SigmaBuilder): Nullable[Constant[SType]] = {
     import builder._
     obj match {
-      case arr: Array[Boolean] => Nullable(mkCollectionConstant[SBoolean.type](arr, SBoolean))
-      case arr: Array[Byte] => Nullable(mkCollectionConstant[SByte.type](arr, SByte))
-      case arr: Array[Short] => Nullable(mkCollectionConstant[SShort.type](arr, SShort))
-      case arr: Array[Int] => Nullable(mkCollectionConstant[SInt.type](arr, SInt))
-      case arr: Array[Long] => Nullable(mkCollectionConstant[SLong.type](arr, SLong))
-      case arr: Array[BigInteger] => Nullable(mkCollectionConstant[SBigInt.type](arr.map[BigInt](n => CBigInt(n)), SBigInt))
-      case arr: Array[String] => Nullable(mkCollectionConstant[SString.type](arr, SString))
+      case arr: Array[Boolean] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SBoolean.type](arr, SBoolean))
+      case arr: Array[Byte] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SByte.type](arr, SByte))
+      case arr: Array[Short] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SShort.type](arr, SShort))
+      case arr: Array[Int] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SInt.type](arr, SInt))
+      case arr: Array[Long] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SLong.type](arr, SLong))
+      case arr: Array[BigInteger] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SBigInt.type](arr.map[BigInt](n => CBigInt(n)), SBigInt))
+      case arr: Array[String] if !VersionContext.current.isV6SoftForkActivated => Nullable(mkCollectionConstant[SString.type](arr, SString))
       case v: AnyValue =>
         val tpe = Evaluation.rtypeToSType(v.tVal)
         Nullable(mkConstant[tpe.type](v.value.asInstanceOf[tpe.WrappedType], tpe))
       case v: Int => Nullable(mkConstant[SInt.type](v, SInt))
       case v: Long => Nullable(mkConstant[SLong.type](v, SLong))
-      case v: BigInteger => Nullable(mkConstant[SBigInt.type](CBigInt(v), SBigInt))
+      case v: BigInteger if !VersionContext.current.isV6SoftForkActivated => Nullable(mkConstant[SBigInt.type](CBigInt(v), SBigInt))
       case n: sigma.BigInt => Nullable(mkConstant[SBigInt.type](n, SBigInt))
       case ge: GroupElement => Nullable(mkConstant[SGroupElement.type](ge, SGroupElement))
       case b: Boolean => Nullable(if (b) TrueLeaf else FalseLeaf)
-      case v: String => Nullable(mkConstant[SString.type](v, SString))
+      case v: String if !VersionContext.current.isV6SoftForkActivated => Nullable(mkConstant[SString.type](v, SString))
       case h: Header if VersionContext.current.isV6SoftForkActivated  => Nullable(mkConstant[SHeader.type](h, SHeader))
 
       // The Box lifting was broken in v4.x. `SigmaDsl.Box(b)` was missing which means the
@@ -38,7 +38,7 @@ object Platform {
       // This method is used as part of consensus in SubstConstants operation, however
       // ErgoBox cannot be passed as argument as it is never valid value during evaluation.
       // Thus we can use activation-based versioning and fix this code when v5.0 is activated.
-      case b: ErgoBox =>
+      case b: ErgoBox if !VersionContext.current.isV6SoftForkActivated =>
         Nullable(mkConstant[SBox.type](CBox(b), SBox)) // fixed in v5.0
 
       // this case is added in v5.0 and it can be useful when the box value comes from a