diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e9098e1..4b3810c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [4.34.3](https://github.com/diplodoc-platform/cli/compare/v4.34.2...v4.34.3) (2024-07-18)
+
+
+### Bug Fixes
+
+* retry parsing existing metadata with duplicate key compatibility ([d1eff78](https://github.com/diplodoc-platform/cli/commit/d1eff78c0210765933b76ee1cf173966bcdc658a))
+
 ## [4.34.2](https://github.com/diplodoc-platform/cli/compare/v4.34.1...v4.34.2) (2024-07-15)
 
 
diff --git a/package-lock.json b/package-lock.json
index 82964110..db22da66 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@diplodoc/cli",
-  "version": "4.34.2",
+  "version": "4.34.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@diplodoc/cli",
-      "version": "4.34.2",
+      "version": "4.34.3",
       "license": "MIT",
       "dependencies": {
         "@diplodoc/client": "^2.6.2",
diff --git a/package.json b/package.json
index ca2cdb85..bfffc7fe 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "author": "Yandex Data UI Team <data-ui@yandex-team.ru>",
   "description": "Make documentation using yfm-docs in Markdown and HTML formats",
   "license": "MIT",
-  "version": "4.34.2",
+  "version": "4.34.3",
   "repository": {
     "type": "git",
     "url": "git@github.com:diplodoc-platform/cli.git"
diff --git a/src/services/metadata/addSourcePath.ts b/src/services/metadata/addSourcePath.ts
index f54155bc..d29f0752 100644
--- a/src/services/metadata/addSourcePath.ts
+++ b/src/services/metadata/addSourcePath.ts
@@ -2,7 +2,7 @@ import {parseExistingMetadata} from './parse';
 import {emplaceMetadata} from './utils';
 
 export const addSourcePath = (fileContent: string, sourcePath: string) => {
-    const {metadata, metadataStrippedContent} = parseExistingMetadata(fileContent);
+    const {metadata, metadataStrippedContent} = parseExistingMetadata(fileContent, sourcePath);
 
     return emplaceMetadata(metadataStrippedContent, {
         ...metadata,
diff --git a/src/services/metadata/enrich.ts b/src/services/metadata/enrich.ts
index 8d2c74a3..433140e2 100644
--- a/src/services/metadata/enrich.ts
+++ b/src/services/metadata/enrich.ts
@@ -30,7 +30,11 @@ export const enrichWithFrontMatter = async ({
 }: EnrichWithFrontMatterOptions) => {
     const {systemVars, metadataVars} = resolvedFrontMatterVars;
     const {resources, addSystemMeta, shouldAlwaysAddVCSPath, pathData} = metadataOptions;
-    const {metadata, metadataStrippedContent} = parseExistingMetadata(fileContent);
+
+    const {metadata, metadataStrippedContent} = parseExistingMetadata(
+        fileContent,
+        pathData.pathToFile,
+    );
 
     const vcsFrontMatter = metadataOptions.isContributorsEnabled
         ? await resolveVCSFrontMatter(metadata, metadataOptions, fileContent)
diff --git a/src/services/metadata/parse.ts b/src/services/metadata/parse.ts
index 1d360055..cb3a3b86 100644
--- a/src/services/metadata/parse.ts
+++ b/src/services/metadata/parse.ts
@@ -1,5 +1,6 @@
-import {dump, load} from 'js-yaml';
+import {YAMLException, dump, load} from 'js-yaml';
 import {metadataBorder} from '../../constants';
+import {logger} from '../../utils';
 
 export type FileMetadata = {
     [key: string]: unknown;
@@ -33,6 +34,31 @@ const matchMetadata = (fileContent: string) => {
     return regexpParseFileContent.exec(fileContent);
 };
 
+const duplicateKeysCompatibleLoad = (yaml: string, filePath: string | undefined) => {
+    try {
+        return load(yaml);
+    } catch (e) {
+        if (e instanceof YAMLException) {
+            const duplicateKeysDeprecationWarning = `
+                Encountered a YAML parsing exception when processing file metadata: ${e.reason}.
+                It's highly possible the input file contains duplicate mapping keys.
+                Will retry processing with necessary compatibility flags.
+                Please note that this behaviour is DEPRECATED and WILL be removed in a future version
+                without further notice, so the build WILL fail when supplied with YAML-incompatible meta.
+            `
+                .replace(/^\s+/gm, '')
+                .replace(/\n/g, ' ')
+                .trim();
+
+            logger.warn(filePath ?? '', duplicateKeysDeprecationWarning);
+
+            return load(yaml, {json: true});
+        }
+
+        throw e;
+    }
+};
+
 /**
  * Temporary workaround to enable parsing YAML metadata from potentially
  * Liquid-aware source files
@@ -52,14 +78,20 @@ const escapeLiquidSubstitutionSyntax = (content: string): string =>
 const unescapeLiquidSubstitutionSyntax = (escapedContent: string): string =>
     escapedContent.replace(/\(\({{/g, '{{').replace(/}}\)\)/g, '}}');
 
-export const parseExistingMetadata = (fileContent: string): ParseExistingMetadataReturn => {
+export const parseExistingMetadata = (
+    fileContent: string,
+    filePath?: string,
+): ParseExistingMetadataReturn => {
     const matches = matchMetadata(fileContent);
 
     if (matches && matches.length > 0) {
         const [, metadata, , metadataStrippedContent] = matches;
 
         return {
-            metadata: load(escapeLiquidSubstitutionSyntax(metadata)) as FileMetadata,
+            metadata: duplicateKeysCompatibleLoad(
+                escapeLiquidSubstitutionSyntax(metadata),
+                filePath,
+            ) as FileMetadata,
             metadataStrippedContent,
         };
     }