diff --git a/backend/migrations/048_vitals_baseline_source_csv.sql b/backend/migrations/048_vitals_baseline_source_csv.sql
new file mode 100644
index 0000000..58cd3ae
--- /dev/null
+++ b/backend/migrations/048_vitals_baseline_source_csv.sql
@@ -0,0 +1,6 @@
+-- Universal-CSV-Import schreibt source = 'csv'; bisherige CHECK erlaubte das nicht → 500 beim Import.
+ALTER TABLE vitals_baseline DROP CONSTRAINT IF EXISTS vitals_baseline_source_check;
+ALTER TABLE vitals_baseline ADD CONSTRAINT vitals_baseline_source_check
+    CHECK (source IN ('manual', 'apple_health', 'garmin', 'withings', 'csv'));
+
+COMMENT ON COLUMN vitals_baseline.source IS 'manual | apple_health | garmin | withings | csv (Universal-Import)';
diff --git a/backend/version.py b/backend/version.py
index 7148790..d7fdaa1 100644
--- a/backend/version.py
+++ b/backend/version.py
@@ -9,7 +9,7 @@ Semantic Versioning: MAJOR.MINOR.PATCH
 
 APP_VERSION = "0.9p"
 BUILD_DATE = "2026-04-09"
-DB_SCHEMA_VERSION = "20260409a"  # Migration 043 (042–043 CSV Parser)
+DB_SCHEMA_VERSION = "20260409b"  # u. a. 048 vitals_baseline.source csv
 
 MODULE_VERSIONS = {
     "auth": "1.2.0",