diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index ff7cdc8..b8695ca 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -6,7 +6,7 @@ from .input import sfcf,openQCD
 import json
 from typing import Union, Optional
 from pyerrors import Obs, Corr, load_object, dump_object
-from hashlib import sha256
+from hashlib import sha256, sha1
 from .tools import cached, record2name_key, make_version_hash
 from .cache_io import is_in_cache, cache_path, cache_dir, get_version_hash
 
@@ -85,18 +85,12 @@ def write_measurement(path, ensemble, measurement, uuid, code, parameter_file: O
             meas_path = file_in_archive + "::" + par_hash
             meas_paths.append(meas_path)
             known_meas[par_hash] = measurement[corr][subkey]
-            
-            if c.execute("SELECT * FROM backlogs WHERE path = ?", (meas_path,)).fetchone() is not None:
-                c.execute("UPDATE backlogs SET updated_at = datetime('now') WHERE path = ?", (meas_path, ))
-            else:
-                c.execute("INSERT INTO backlogs (name, ensemble, code, path, project, parameters, parameter_file, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?, datetime('now'), datetime('now'))",
+            data_hash = sha1(pj.create_json_string(measurement[corr][subkey]).encode('UTF-8')).hexdigest()
+            if c.execute("SELECT * FROM backlogs WHERE path = ?", (meas_path,)).fetchone() is None:
+                c.execute("INSERT INTO backlogs (name, ensemble, code, path, project, parameters, parameter_file, created_at) VALUES (?, ?, ?, ?, ?, ?, ?, datetime('now'))",
                                                 (corr, ensemble, code, meas_path, uuid, pars[subkey], parameter_file))
-        conn.commit()
+            c.execute("UPDATE backlogs SET current_version = ?, updated_at = datetime('now') WHERE path = ?", (data_hash, meas_path))
         pj.dump_dict_to_json(known_meas, file)
-        for meas_path in meas_paths:
-            version_hash = make_version_hash(path, meas_path)
-            print(version_hash)
-            c.execute("UPDATE backlogs SET current_version = ? WHERE project = ? AND code = ? and name = ?", (version_hash, uuid, code, corr))
         conn.commit()
     files.append(db)
     conn.close()