diff --git a/build.gradle.kts b/build.gradle.kts
index b24c5a70..2dcf5b24 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,4 +1,4 @@
-val dataforgeVersion by extra("0.1.3-dev-3")
+val dataforgeVersion by extra("0.1.3-dev-4")
 
 allprojects {
     repositories {
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt
index aebb18d6..2be5c1a0 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt
@@ -50,7 +50,9 @@ abstract class AbstractMutableMeta<M : MutableMeta<M>> : AbstractMetaNode<M>(),
     protected open fun replaceItem(key: NameToken, oldItem: MetaItem<M>?, newItem: MetaItem<M>?) {
         if (newItem == null) {
             _items.remove(key)
-            oldItem?.node?.removeListener(this)
+            if(oldItem!= null && oldItem is MetaItem.NodeItem<M>) {
+                oldItem.node.removeListener(this)
+            }
         } else {
             _items[key] = newItem
             if (newItem is MetaItem.NodeItem) {
@@ -65,8 +67,8 @@ abstract class AbstractMutableMeta<M : MutableMeta<M>> : AbstractMetaNode<M>(),
     @Suppress("UNCHECKED_CAST")
     protected fun wrapItem(item: MetaItem<*>?): MetaItem<M>? = when (item) {
         null -> null
-        is MetaItem.ValueItem -> item as MetaItem<M>
-        is MetaItem.NodeItem<*> -> MetaItem.NodeItem(wrapNode(item.node))
+        is MetaItem.ValueItem -> item
+        is MetaItem.NodeItem -> MetaItem.NodeItem(wrapNode(item.node))
     }
 
     /**
@@ -98,8 +100,11 @@ abstract class AbstractMutableMeta<M : MutableMeta<M>> : AbstractMetaNode<M>(),
     }
 }
 
-fun MutableMeta<*>.remove(name: Name) = set(name, null)
-fun MutableMeta<*>.remove(name: String) = remove(name.toName())
+
+@Suppress("NOTHING_TO_INLINE")
+inline fun MutableMeta<*>.remove(name: Name) = set(name, null)
+@Suppress("NOTHING_TO_INLINE")
+inline fun MutableMeta<*>.remove(name: String) = remove(name.toName())
 
 fun MutableMeta<*>.setValue(name: Name, value: Value) =
     set(name, MetaItem.ValueItem(value))
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
index 20f86779..5753512b 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
@@ -97,7 +97,7 @@ object True : Value {
     override val value: Any? get() = true
     override val type: ValueType get() = ValueType.BOOLEAN
     override val number: Number get() = 1.0
-    override val string: String get() = "+"
+    override val string: String get() = "true"
 
     override fun toString(): String = value.toString()
 }
@@ -109,7 +109,7 @@ object False : Value {
     override val value: Any? get() = false
     override val type: ValueType get() = ValueType.BOOLEAN
     override val number: Number get() = -1.0
-    override val string: String get() = "-"
+    override val string: String get() = "false"
 }
 
 val Value.boolean get() = this == True || this.list.firstOrNull() == True || (type == ValueType.STRING && string.toBoolean())
diff --git a/dataforge-meta/src/commonTest/kotlin/hep/dataforge/meta/MutableMetaTest.kt b/dataforge-meta/src/commonTest/kotlin/hep/dataforge/meta/MutableMetaTest.kt
new file mode 100644
index 00000000..5ab75fd4
--- /dev/null
+++ b/dataforge-meta/src/commonTest/kotlin/hep/dataforge/meta/MutableMetaTest.kt
@@ -0,0 +1,22 @@
+package hep.dataforge.meta
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class MutableMetaTest{
+    @Test
+    fun testRemove(){
+        val meta = buildMeta {
+            "aNode" to {
+                "innerNode" to {
+                    "innerValue" to true
+                }
+                "b" to 22
+                "c" to "StringValue"
+            }
+        }.toConfig()
+
+        meta.remove("aNode.c")
+        assertEquals(meta["aNode.c"], null)
+    }
+}
\ No newline at end of file