diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index bf6c7ae..9195b11 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -34,10 +34,11 @@ def write_measurement(path, ensemble, measurement, uuid, code, parameter_file):
     conn = sqlite3.connect(path + '/backlogger.db')
     c = conn.cursor()
     files = []
+    hashed_measurement = {}
     for corr in measurement.keys():
         file = path + "/archive/" + ensemble + "/" + corr + '/' + uuid + '.json.gz'
         files.append(file)
-        known_meas = None
+        known_meas = {}
         if not os.path.exists(path + "/archive/" + ensemble + "/" + corr):
             os.makedirs(path + "/archive/" + ensemble + "/" + corr)
         else:
@@ -45,27 +46,29 @@ def write_measurement(path, ensemble, measurement, uuid, code, parameter_file):
                 dl.unlock(file, dataset=path)
                 known_meas = pj.load_json_dict(file)
         if code == "sfcf":
+            hashed_measurement[corr] = {}
             for subkey in measurement[corr].keys():
                 pars = sfcf.get_specs(corr + "/" + subkey, parameters)
-                parHash = sha256(str(pars))
+                parHash = sha256(str(pars).encode('UTF-8')).hexdigest()
                 meas_path = file + "::" + parHash
-                if known_meas is not None:
-                    known_meas[parHash] = measurement[corr][parHash]
-                else:
-                    known_meas = measurement[corr]
+                known_meas[parHash] = 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'))",
-                                                    (corr, ensemble, code, meas_path, uuid, sfcf.get_specs(corr + "/" + subkey, parameters), parameter_file))
+                                                    (corr, ensemble, code, meas_path, uuid, pars, parameter_file))
         elif code == "openQCD":
             for i in range(len(parameters["rw_fcts"])):
-                subkey = "/".join(parameters["rw_fcts"][i])
-                meas_path = file + "::" + subkey
-                c.execute("INSERT INTO backlogs (name, ensemble, code, path, project, parameters, parameter_file, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?, datetime('now'), datetime('now'))", ("ms1", ensemble, code, meas_path, uuid, json.dumps(parameters["rw_fcts"][i]), parameter_file))
+                pars = json.dumps(parameters["rw_fcts"][i])
+                parHash = sha256(str(pars).encode('UTF-8')).hexdigest()
+                meas_path = file + "::" + parHash
+                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'))", ("ms1", ensemble, code, meas_path, uuid, json.dumps(parameters["rw_fcts"][i]), parameter_file))
         conn.commit()
-        pj.dump_dict_to_json(measurement[corr], file)
+        pj.dump_dict_to_json(known_meas, file)
     files.append(path + '/backlogger.db')
     conn.close()
     dl.save(files, message="Add measurements to database", dataset=path)