Merging an entity with properties with missing datatype leads to Exception

In [1]: import caosdb as db

In [2]: from caosdb.apiutils import merge_entities

In [3]: merge_entities(db.Record().add_property("a", 5, datatype="B"), db.Record().add_property("a", [1,2]),force=True)
   ...: 
WARNING:root:This function is currently experimental and insufficiently tested. Use with care.
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
File ~/CaosDB/caosdb-pylib/src/caosdb/common/models.py:1379, in _parse_value(datatype, value)
   1378 try:
-> 1379     return int(value)
   1380 except ValueError:
   1381     # reference via name

TypeError: int() argument must be a string, a bytes-like object or a real number, not 'list'

During handling of the above exception, another exception occurred:

ServerConfigurationException              Traceback (most recent call last)
Cell In [3], line 1
----> 1 merge_entities(db.Record().add_property("a", 5, datatype="B"), db.Record().add_property("a", [1,2]),force=True)

File ~/CaosDB/caosdb-pylib/src/caosdb/apiutils.py:433, in merge_entities(entity_a, entity_b, merge_references_with_empty_diffs, force)
    430     setattr(entity_a.get_property(key), attribute,
    431             diff_r2["properties"][key][attribute])
    432 elif force:
--> 433     setattr(entity_a.get_property(key), attribute,
    434             diff_r2["properties"][key][attribute])
    435 else:
    436     raise RuntimeError(
    437         f"Merge conflict:\nEntity a ({entity_a.id}, {entity_a.name}) "
    438         f"has a Property '{key}' with {attribute}="
   (...)
    441         f"has a Property '{key}' with {attribute}="
    442         f"{diff_r1['properties'][key][attribute]}")

File ~/CaosDB/caosdb-pylib/src/caosdb/common/models.py:277, in Entity.value(self, new_value)
    275 @value.setter
    276 def value(self, new_value):
--> 277     self.__value = _parse_value(self.datatype, new_value)

File ~/CaosDB/caosdb-pylib/src/caosdb/common/models.py:1387, in _parse_value(datatype, value)
   1384 except TypeError:
   1385     # deal with invalid XML: List of values without appropriate datatype
   1386     if isinstance(value, list):
-> 1387         raise ServerConfigurationException(
   1388             "The server sent an invalid XML: List valued properties must be announced by "
   1389             "the datatype.\n" + f"Datatype: {datatype}\nvalue: {value}")

ServerConfigurationException: The server sent an invalid XML: List valued properties must be announced by the datatype.
Datatype: B
value: [1, 2]