diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f51a45141eb4bd2f4dc14b0fcb856114cfcf642..f7ab71fa2da0b81aadca7bba42296dac8300d219 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+### Pre-release v4.0.0b8 - Release date: TBD
+
+* Fixed major bug: Prevent accidental `job_data_{expid}.db` file creation
+
 ### Pre-release v4.0.0b7 - Release date: 2024-05-14
 
 * Reduced writing time in status updater background task
diff --git a/autosubmit_api/__init__.py b/autosubmit_api/__init__.py
index 2eeabb72a6e3aa7797442fbd31b95425370317ca..a539f1b993b62ca52ed101a7855a3aebb82d1caa 100644
--- a/autosubmit_api/__init__.py
+++ b/autosubmit_api/__init__.py
@@ -17,6 +17,6 @@
 # You should have received a copy of the GNU General Public License
 # along with Autosubmit.  If not, see <http://www.gnu.org/licenses/>.
 
-__version__ = "4.0.0b7"
+__version__ = "4.0.0b8"
 __author__ = "Luiggi Tenorio, Bruno P. Kinoshita, Cristian Gutiérrez, Julian Berlin, Wilmer Uruchi"
 __credits__ = "Barcelona Supercomputing Center"
\ No newline at end of file
diff --git a/autosubmit_api/autosubmit_legacy/job/job_list.py b/autosubmit_api/autosubmit_legacy/job/job_list.py
index 3db57957da0079baa57ee0b0d47937bce2d837bb..cc6e085f87cc4247f5544c1772cf77b8f2b10282 100644
--- a/autosubmit_api/autosubmit_legacy/job/job_list.py
+++ b/autosubmit_api/autosubmit_legacy/job/job_list.py
@@ -589,8 +589,12 @@ class JobList:
         db_file = os.path.join(path_local_root, basic_config.DB_FILE)
         # Job information from job historic data
         # print("Get current job data structure...")
-        experiment_history = ExperimentHistoryDirector(ExperimentHistoryBuilder(expid)).build_reader_experiment_history()
-        job_data = experiment_history.manager.get_all_last_job_data_dcs() if experiment_history.is_header_ready() else None
+        job_data = None
+        try:
+            experiment_history = ExperimentHistoryDirector(ExperimentHistoryBuilder(expid)).build_reader_experiment_history()
+            job_data = experiment_history.manager.get_all_last_job_data_dcs() if experiment_history.is_header_ready() else None
+        except Exception:
+            print(traceback.print_exc())
         # Result variables
         job_running_time_seconds = dict()
         job_running_to_runtext = dict()
diff --git a/autosubmit_api/builders/experiment_history_builder.py b/autosubmit_api/builders/experiment_history_builder.py
index c1d090b8cdaec5b5af34cd6f5d83566ee475d582..dd13a67b75371458644483387ff7a2bb18c52ebd 100644
--- a/autosubmit_api/builders/experiment_history_builder.py
+++ b/autosubmit_api/builders/experiment_history_builder.py
@@ -57,6 +57,9 @@ class ExperimentHistoryBuilder(Builder):
     self._validate_basic_config()
     if not self.experiment_history_db_manager:
       raise Exception("Experiment Database Manager is missing")
+    else:
+      if not self.experiment_history_db_manager.my_database_exists():
+        raise Exception("Job/Runs database does not exist")
     if not self.logger:
       raise Exception("Logging is missing.")
     return ExperimentHistory(self.expid, self.basic_config, self.experiment_history_db_manager, self.logger)
diff --git a/autosubmit_api/database/db_jobdata.py b/autosubmit_api/database/db_jobdata.py
index 25a70ad81b4495657b388e5e5303206c67613ff0..b19d6c2f63a1e7e31ac3ad8ed2311fe2b8663819 100644
--- a/autosubmit_api/database/db_jobdata.py
+++ b/autosubmit_api/database/db_jobdata.py
@@ -490,6 +490,7 @@ class MainDataBase():
             if self.conn:
                 c = self.conn.cursor()
                 c.execute(self.create_table_query)
+                self.conn.commit()
             else:
                 raise IOError("Not a valid connection")
         except IOError as exp:
diff --git a/autosubmit_api/experiment/common_requests.py b/autosubmit_api/experiment/common_requests.py
index f730d58d0fafc31c8523d10a09201e8a41a1bb2c..82be53fc00d8a32e79e3d2057778563f233d540f 100644
--- a/autosubmit_api/experiment/common_requests.py
+++ b/autosubmit_api/experiment/common_requests.py
@@ -172,16 +172,20 @@ def get_experiment_data(expid):
         result["pkl_timestamp"] = autosubmit_config_facade.get_pkl_last_modified_timestamp()
         result["chunk_size"] = autosubmit_config_facade.chunk_size
         result["chunk_unit"] = autosubmit_config_facade.chunk_unit
-        experiment_history = ExperimentHistoryDirector(ExperimentHistoryBuilder(expid)).build_reader_experiment_history()
-        experiment_run = experiment_history.manager.get_experiment_run_dc_with_max_id()
-        if experiment_run and experiment_run.total > 0:
-            result["total_jobs"] = experiment_run.total
-            result["completed_jobs"] = experiment_run.completed
-            result["db_historic_version"] = experiment_history.manager.db_version
-        else:
-            result["total_jobs"] = 0
-            result["completed_jobs"] = 0
-            result["db_historic_version"] = "NA"
+
+        result["total_jobs"] = 0
+        result["completed_jobs"] = 0
+        result["db_historic_version"] = "NA"
+        try:
+            experiment_history = ExperimentHistoryDirector(ExperimentHistoryBuilder(expid)).build_reader_experiment_history()
+            experiment_run = experiment_history.manager.get_experiment_run_dc_with_max_id()
+            if experiment_run and experiment_run.total > 0:
+                result["total_jobs"] = experiment_run.total
+                result["completed_jobs"] = experiment_run.completed
+                result["db_historic_version"] = experiment_history.manager.db_version
+        except Exception as exc:
+            logger.warning((traceback.format_exc()))
+            logger.warning((f"Warning: Error in get_experiment_data while reading historical data: {exc}"))
 
     except Exception as exp:
         result["error"] = True