diff --git a/web_server.py b/web_server.py
index c02c28ed..92820feb 100644
--- a/web_server.py
+++ b/web_server.py
@@ -18999,6 +18999,15 @@ def get_version_info():
         "title": "What's New in SoulSync",
         "subtitle": f"Version {SOULSYNC_VERSION} — Latest Changes",
         "sections": [
+            {
+                "title": "🔧 Fix Watch All Unwatched Skipping Deezer Artists",
+                "description": "Watch All Unwatched now supports Deezer as an ID source",
+                "features": [
+                    "• Added Deezer ID support to the bulk watchlist add flow",
+                    "• Source detection based on actual ID field used instead of numeric heuristic",
+                    "• Fallback chain: active source first, then Spotify, iTunes, Deezer"
+                ]
+            },
             {
                 "title": "🔧 Fix Library Maintenance Path Fixes Failing Silently",
                 "description": "Path mismatch fixes now use fresh config and report errors to the UI",
@@ -34257,11 +34266,14 @@ def watchlist_all_unwatched_library_artists():
             artist_id = None
             if active_source == 'spotify' and artist.get('spotify_artist_id'):
                 artist_id = artist['spotify_artist_id']
+            elif active_source == 'deezer' and artist.get('deezer_id'):
+                artist_id = artist['deezer_id']
+            elif artist.get('spotify_artist_id'):
+                artist_id = artist['spotify_artist_id']
             elif artist.get('itunes_artist_id'):
                 artist_id = artist['itunes_artist_id']
-            elif artist.get('spotify_artist_id'):
-                # Fallback: use spotify if itunes not available
-                artist_id = artist['spotify_artist_id']
+            elif artist.get('deezer_id'):
+                artist_id = artist['deezer_id']
 
             if not artist_id:
                 skipped_no_id += 1
@@ -34276,9 +34288,13 @@ def watchlist_all_unwatched_library_artists():
                 skipped_already += 1
                 continue
 
-            is_numeric = artist_id.isdigit()
-            fb_source = _get_metadata_fallback_source()
-            src = fb_source if is_numeric else 'spotify'
+            # Determine source based on which ID field we picked
+            if artist_id == artist.get('spotify_artist_id'):
+                src = 'spotify'
+            elif artist_id == artist.get('deezer_id'):
+                src = 'deezer'
+            else:
+                src = _get_metadata_fallback_source()
             success = database.add_artist_to_watchlist(artist_id, artist_name, profile_id=get_current_profile_id(), source=src)
             if success:
                 added += 1
diff --git a/webui/static/helper.js b/webui/static/helper.js
index 063d1da7..1d53327a 100644
--- a/webui/static/helper.js
+++ b/webui/static/helper.js
@@ -3403,6 +3403,7 @@ function closeHelperSearch() {
 const WHATS_NEW = {
     '2.1': [
         // Newest features first
+        { title: 'Fix Watch All Unwatched',           desc: 'Watch All Unwatched now works for Deezer users — was silently skipping artists with only Deezer IDs' },
         { title: 'Fix Path Mismatch Fixes',         desc: 'Library Maintenance path fixes now use fresh config and show error reasons in the toast' },
         { title: 'Fix Wrong Spotify IDs',         desc: 'Manual match no longer stores iTunes IDs as Spotify IDs — detects actual provider from results' },
         { title: 'Spotify Enrichment Budget',   desc: 'Background enrichment worker caps at 3,000 items/day to prevent rate limit bans — resets at midnight' },