diff --git a/src/pyFAI/io/integration_config.py b/src/pyFAI/io/integration_config.py
index 37dd30090..f4f998d03 100644
--- a/src/pyFAI/io/integration_config.py
+++ b/src/pyFAI/io/integration_config.py
@@ -31,7 +31,7 @@
 __author__ = "Jerome Kieffer"
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "15/04/2024"
+__date__ = "04/07/2024"
 __docformat__ = 'restructuredtext'
 
 import logging
@@ -76,9 +76,12 @@ def _patch_v1_to_v2(config):
 
     :param dict config: Dictionary reworked inplace.
     """
-
-    value = config.pop("poni", None)
     detector = None
+    value = config.pop("poni", None)
+    if value is None and "poni_version" in config:
+        # Anachronistic configuration, bug found in #2227
+        value = config.copy()
+        config.clear()  # Do not change the object: empty in place
     if value:
         # Use the poni file while it is not overwrited by a key of the config
         # dictionary
diff --git a/src/pyFAI/test/test_worker.py b/src/pyFAI/test/test_worker.py
index b6437e536..a37f61fe2 100644
--- a/src/pyFAI/test/test_worker.py
+++ b/src/pyFAI/test/test_worker.py
@@ -32,7 +32,7 @@
 __contact__ = "valentin.valls@esrf.fr"
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "30/04/2024"
+__date__ = "04/07/2024"
 
 import unittest
 import logging
@@ -439,6 +439,29 @@ def test_old(self):
         ai = worker.ai
         self.assertTrue(numpy.allclose(config["shape"], ai.detector.max_shape))
 
+    def test_regression_2227(self):
+        """pixel size got lost with generic detector"""
+        worker_generic = Worker()
+        integration_options_generic = {'poni_version': 2.1,
+                                       'detector': 'Detector',
+                                       'detector_config': {'pixel1': 1e-4,
+                                                           'pixel2': 1e-4,
+                                                           'max_shape': [576, 748],
+                                                           'orientation': 3},
+                                       'dist': 0.16156348926909264,
+                                       'poni1': 1.4999999999999998,
+                                       'poni2': 1.4999999999999998,
+                                       'rot1': 1.0822864853552985,
+                                       'rot2': -0.41026007690779387,
+                                       'rot3': 0.0,
+                                       'wavelength': 1.0332016536100021e-10}
+        worker_generic.set_config(integration_options_generic)
+        self.assertEqual(worker_generic.ai.detector.pixel1, 1e-4, "Pixel1 size matches")
+        self.assertEqual(worker_generic.ai.detector.pixel2, 1e-4, "Pixel2 size matches")
+        self.assertEqual(worker_generic.ai.detector.shape, [576, 748], "Shape matches")
+        self.assertEqual(worker_generic.ai.detector.orientation, 3, "Orientation matches")
+
+
 def suite():
     loader = unittest.defaultTestLoader.loadTestsFromTestCase
     testsuite = unittest.TestSuite()
diff --git a/version.py b/version.py
index 80034e256..c3b037f88 100755
--- a/version.py
+++ b/version.py
@@ -47,7 +47,7 @@
 __authors__ = ["Jérôme Kieffer", "V. Valls"]
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "03/06/2024"
+__date__ = "04/07/2024"
 __status__ = "production"
 __docformat__ = 'restructuredtext'
 __all__ = ["date", "version_info", "strictversion", "hexversion", "debianversion",
@@ -61,7 +61,7 @@
                        "final": 15}
 
 MAJOR = 2024
-MINOR = 6
+MINOR = 7
 MICRO = 0
 RELEV = "dev"  # <16
 SERIAL = 0  # <16