diff --git a/plugins/maven/src/main/java/org/jetbrains/idea/maven/project/MavenProjectsTree.kt b/plugins/maven/src/main/java/org/jetbrains/idea/maven/project/MavenProjectsTree.kt
index 61142495ec7e..a20270680a87 100644
--- a/plugins/maven/src/main/java/org/jetbrains/idea/maven/project/MavenProjectsTree.kt
+++ b/plugins/maven/src/main/java/org/jetbrains/idea/maven/project/MavenProjectsTree.kt
@@ -1063,8 +1063,8 @@ class MavenProjectsTree(val project: Project) {
   companion object {
     private val LOG = Logger.getInstance(MavenProjectsTree::class.java)
 
-    private const val STORAGE_VERSION_NUMBER = 10
-    private val STORAGE_VERSION = MavenProjectsTree::class.java.simpleName + "." + STORAGE_VERSION_NUMBER
+    private const val STORAGE_VERSION_NUMBER = 11
+    val STORAGE_VERSION = MavenProjectsTree::class.java.simpleName + "." + STORAGE_VERSION_NUMBER
 
     private fun String.getStorageVersionNumber(): Int {
       val parts = this.split(".")
diff --git a/plugins/maven/src/test/intellij.maven.tests.iml b/plugins/maven/src/test/intellij.maven.tests.iml
index 5ed1a43a275c..2a0348f387d4 100644
--- a/plugins/maven/src/test/intellij.maven.tests.iml
+++ b/plugins/maven/src/test/intellij.maven.tests.iml
@@ -35,5 +35,6 @@
     <orderEntry type="module" module-name="intellij.java.impl" scope="TEST" />
     <orderEntry type="module" module-name="intellij.platform.backend.observation" scope="TEST" />
     <orderEntry type="library" scope="TEST" name="hash4j" level="project" />
+    <orderEntry type="library" name="kotlin-reflect" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/plugins/maven/src/test/java/org/jetbrains/idea/maven/project/importing/MavenProjectTreeVersionNumberTest.kt b/plugins/maven/src/test/java/org/jetbrains/idea/maven/project/importing/MavenProjectTreeVersionNumberTest.kt
new file mode 100644
index 000000000000..78e19c0b7fce
--- /dev/null
+++ b/plugins/maven/src/test/java/org/jetbrains/idea/maven/project/importing/MavenProjectTreeVersionNumberTest.kt
@@ -0,0 +1,59 @@
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.idea.maven.project.importing
+
+import com.dynatrace.hash4j.hashing.HashSink
+import com.dynatrace.hash4j.hashing.Hashing
+import com.intellij.testFramework.UsefulTestCase
+import org.jetbrains.idea.maven.project.MavenProjectsTree
+import kotlin.reflect.KClass
+import kotlin.reflect.KProperty
+import kotlin.reflect.KType
+import kotlin.reflect.full.createType
+import kotlin.reflect.full.declaredMembers
+import kotlin.reflect.full.findAnnotation
+
+
+class MavenProjectTreeVersionNumberTest : UsefulTestCase() {
+
+  fun `test do not forget updating STORAGE_VERSION_NUMBER when structure changed`() {
+    val hash = Hashing.komihash5_0().hashStream();
+    val recursionKeeper = HashSet<String>()
+    hashKType(MavenProjectsTree::class.createType(), recursionKeeper, hash)
+
+    hash.putString(MavenProjectsTree.STORAGE_VERSION)
+    assertEquals("UPDATE STORAGE VERSION ALONG WITH THIS HASH!!!", -1853310441163155393L, hash.asLong)
+  }
+
+  private fun hashKType(type: KType, recursionKeeper: MutableSet<String>, hash: HashSink) {
+    val klass = type.classifier as? KClass<*> ?: return
+
+    hash.putString(klass.qualifiedName)
+    hash.putBoolean(type.isMarkedNullable)
+    type.arguments.forEach { projection ->
+      val type = projection.type
+      if (type == null) {
+        hash.putString(projection.toString())
+      }
+      else {
+        hashKType(type, recursionKeeper, hash)
+      }
+    }
+    if (shouldGoDeeper(klass) && recursionKeeper.add(klass.qualifiedName!!)) {
+      klass.declaredMembers.filterIsInstance<KProperty<*>>().forEach { t ->
+        if (!isTransient(t)) {
+          hash.putString(t.name)
+          hashKType(t.returnType, recursionKeeper, hash)
+        }
+      }
+    }
+  }
+
+  private fun shouldGoDeeper(klass: KClass<*>): Boolean {
+    return klass.qualifiedName?.startsWith("org.jetbrains.idea.maven") == true
+  }
+
+  private fun isTransient(prop: KProperty<*>): Boolean {
+    return prop.findAnnotation<Transient>() != null &&
+           prop.findAnnotation<kotlinx.serialization.Transient>() == null
+  }
+}
\ No newline at end of file