diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java
index b750ee2167bb..497d45078fec 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java
@@ -66,6 +66,10 @@
 
 @SuppressWarnings("rawtypes")
 public class DefaultGenerator implements Generator {
+    private static final String FILE_PATH_COLLISION_LOG = "FILEPATH_COLLISION";
+    private static final String FILE_PATH_COLLISION_LOG_MESSAGE =
+            FILE_PATH_COLLISION_LOG + ": File path collision detected. Files may be overwritten by later-processed collisions. " +
+            "Use 'modelNameMappings' or another name mapping to resolve file name collisions.";
     private static final String METADATA_DIR = ".openapi-generator";
     protected final Logger LOGGER = LoggerFactory.getLogger(DefaultGenerator.class);
     private final boolean dryRun;
@@ -1461,7 +1465,9 @@ private File processTemplateToFile(Map<String, Object> templateData, String temp
 
                 // O(1) case-insensitive duplicate check via a pre-lowercased shadow set
                 if (!seenFilesLower.add(absoluteTarget.toString().toLowerCase(Locale.ROOT))) {
-                    LOGGER.warn("Duplicate file path detected. Not all operating systems can handle case sensitive file paths. path={}", absoluteTarget);
+                    once(LOGGER).warn(FILE_PATH_COLLISION_LOG_MESSAGE);
+                    LOGGER.warn("Duplicate file path detected. Not all operating systems can handle case sensitive file paths, see log '{}' for more information. path={}",
+                            FILE_PATH_COLLISION_LOG, absoluteTarget);
                 }
                 return this.templateProcessor.write(templateData, templateName, target);
             } else {