KT-12512 "Different IDE and Maven plugin version" inspection is being invoked for non-tracked pom.xml files

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/inspections/SameVersionIDEPluginInspection.kt

@@ -22,6 +22,7 @@ import com.intellij.util.xml.highlighting.DomElementAnnotationHolder
 import com.intellij.util.xml.highlighting.DomElementsInspection
 import org.jetbrains.idea.maven.dom.model.MavenDomPlugin
 import org.jetbrains.idea.maven.dom.model.MavenDomProjectModel
+import org.jetbrains.idea.maven.project.MavenProjectsManager
 import org.jetbrains.kotlin.idea.maven.PomFile
 import org.jetbrains.kotlin.idea.versions.bundledRuntimeVersion
 
@@ -33,6 +34,13 @@ class SameVersionIDEPluginInspection : DomElementsInspection<MavenDomProjectMode
             return
         }
 
+        val project = domFileElement.module?.project ?: return
+        val mavenManager = MavenProjectsManager.getInstance(project) ?: return
+
+        if (!mavenManager.isMavenizedProject || !mavenManager.isManagedFile(domFileElement.file.virtualFile)) {
+            return
+        }
+
         val pomFile = PomFile(domFileElement.file)
         pomFile.findKotlinPlugins().filter { it.version.exists() && it.version.stringValue != idePluginVersion }.forEach { plugin ->
             createProblem(holder, plugin)