diff --git a/src/main/java/auctiora/DatabaseService.java b/src/main/java/auctiora/DatabaseService.java
index 9e3a40b..8f056d6 100644
--- a/src/main/java/auctiora/DatabaseService.java
+++ b/src/main/java/auctiora/DatabaseService.java
@@ -443,8 +443,13 @@ public class DatabaseService {
             ps.setLong(10, Instant.now().getEpochSecond());
             ps.executeUpdate();
          } catch (SQLException e) {
-            // If it fails due to UNIQUE constraint on url, try updating by url instead
-            if (e.getMessage().contains("UNIQUE constraint failed: auctions.url")) {
+            // Handle both PRIMARY KEY and URL constraint failures
+            String errMsg = e.getMessage();
+            if (errMsg.contains("UNIQUE constraint failed: auctions.auction_id") ||
+                errMsg.contains("UNIQUE constraint failed: auctions.url") ||
+                errMsg.contains("PRIMARY KEY constraint failed")) {
+
+               // Try updating by URL as fallback (most reliable unique identifier)
                var updateByUrlSql = """
                        UPDATE auctions SET
                            auction_id = ?,
@@ -470,7 +475,11 @@ public class DatabaseService {
 
                   int updated = ps.executeUpdate();
                   if (updated == 0) {
-                     log.warn("Could not insert or update auction with url={}, auction_id={}", auction.url(), auction.auctionId());
+                     // Auction doesn't exist by URL either - this is unexpected
+                     log.warn("Could not insert or update auction with url={}, auction_id={} - constraint violation but no existing record found",
+                             auction.url(), auction.auctionId());
+                  } else {
+                     log.debug("Updated existing auction by URL: {}", auction.url());
                   }
                }
             } else {