diff --git a/instrumentation/lettuce/lettuce-5.1/library/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/OpenTelemetryTracing.java b/instrumentation/lettuce/lettuce-5.1/library/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/OpenTelemetryTracing.java
index 6fb88f269b5e..3b2e06f3b64e 100644
--- a/instrumentation/lettuce/lettuce-5.1/library/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/OpenTelemetryTracing.java
+++ b/instrumentation/lettuce/lettuce-5.1/library/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/OpenTelemetryTracing.java
@@ -43,6 +43,8 @@ final class OpenTelemetryTracing implements Tracing {
   private static final AttributeKey<String> DB_SYSTEM = AttributeKey.stringKey("db.system");
   private static final AttributeKey<String> DB_STATEMENT = AttributeKey.stringKey("db.statement");
   private static final AttributeKey<String> DB_QUERY_TEXT = AttributeKey.stringKey("db.query.text");
+  private static final AttributeKey<Long> DB_REDIS_DATABASE_INDEX =
+      AttributeKey.longKey("db.redis.database_index");
   // copied from DbIncubatingAttributes.DbSystemIncubatingValues
   private static final String REDIS = "redis";
 
@@ -313,6 +315,16 @@ public synchronized Tracer.Span tag(String key, String value) {
         argsString = value;
         return this;
       }
+      if (key.equals("db.namespace") && SemconvStability.emitOldDatabaseSemconv()) {
+        // map backwards into db.redis.database.index
+        long val = Long.parseLong(value);
+        if (span != null) {
+          span.setAttribute(DB_REDIS_DATABASE_INDEX, val);
+        } else {
+          spanBuilder.setAttribute(DB_REDIS_DATABASE_INDEX, val);
+        }
+        return this;
+      }
       if (span != null) {
         span.setAttribute(key, value);
       } else {
diff --git a/instrumentation/lettuce/lettuce-5.1/testing/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/AbstractLettuceClientTest.java b/instrumentation/lettuce/lettuce-5.1/testing/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/AbstractLettuceClientTest.java
index dff22a6a78e7..56573539a278 100644
--- a/instrumentation/lettuce/lettuce-5.1/testing/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/AbstractLettuceClientTest.java
+++ b/instrumentation/lettuce/lettuce-5.1/testing/src/main/java/io/opentelemetry/instrumentation/lettuce/v5_1/AbstractLettuceClientTest.java
@@ -7,9 +7,11 @@
 
 import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.equalTo;
 import static io.opentelemetry.semconv.incubating.DbIncubatingAttributes.DB_NAMESPACE;
+import static io.opentelemetry.semconv.incubating.DbIncubatingAttributes.DB_REDIS_DATABASE_INDEX;
 
 import io.lettuce.core.RedisClient;
 import io.lettuce.core.api.StatefulRedisConnection;
+import io.opentelemetry.instrumentation.api.internal.SemconvStability;
 import io.opentelemetry.instrumentation.testing.internal.AutoCleanupExtension;
 import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
 import io.opentelemetry.sdk.testing.assertj.AttributeAssertion;
@@ -80,10 +82,15 @@ private ContainerConnection(StatefulRedisConnection<String, String> connection,
     }
   }
 
+  @SuppressWarnings("deprecation") // using deprecated semconv
   protected static List<AttributeAssertion> addExtraAttributes(AttributeAssertion... assertions) {
     List<AttributeAssertion> result = new ArrayList<>(Arrays.asList(assertions));
     if (Boolean.getBoolean("testLatestDeps")) {
-      result.add(equalTo(DB_NAMESPACE, "0"));
+      if (SemconvStability.emitStableDatabaseSemconv()) {
+        result.add(equalTo(DB_NAMESPACE, "0"));
+      } else {
+        result.add(equalTo(DB_REDIS_DATABASE_INDEX, 0));
+      }
     }
     return result;
   }