ViriBack plugin exception

[udgover]

Scheduled feed task ViriBack tracker is raising the following exceptions:

File "/app/core/taskmanager.py", line 79, in run_task
    task.run()
  File "/app/plugins/feeds/public/viriback_tracker.py", line 29, in run
    df = self._filter_observables_by_time(df, "FirstSeen")
  File "/app/core/schemas/task.py", line 109, in _filter_observables_by_time
    df = df[df[column] > np.datetime64(self.last_run)]
  File "/root/.cache/pypoetry/virtualenvs/yeti-9TtSrW0h-py3.10/lib/python3.10/site-packages/pandas/core/ops/common.py", line 76, in new_method
    return method(self, other)
  File "/root/.cache/pypoetry/virtualenvs/yeti-9TtSrW0h-py3.10/lib/python3.10/site-packages/pandas/core/arraylike.py", line 56, in __gt__
    return self._cmp_method(other, operator.gt)
  File "/root/.cache/pypoetry/virtualenvs/yeti-9TtSrW0h-py3.10/lib/python3.10/site-packages/pandas/core/series.py", line 5799, in _cmp_method
    res_values = ops.comparison_op(lvalues, rvalues, op)
  File "/root/.cache/pypoetry/virtualenvs/yeti-9TtSrW0h-py3.10/lib/python3.10/site-packages/pandas/core/ops/array_ops.py", line 346, in comparison_op
    res_values = comp_method_OBJECT_ARRAY(op, lvalues, rvalues)
  File "/root/.cache/pypoetry/virtualenvs/yeti-9TtSrW0h-py3.10/lib/python3.10/site-packages/pandas/core/ops/array_ops.py", line 131, in comp_method_OBJECT_ARRAY
    result = libops.scalar_compare(x.ravel(), y, op)
  File "ops.pyx", line 107, in pandas._libs.ops.scalar_compare
numpy.core._exceptions._UFuncNoLoopError: ufunc 'less' did not contain a loop with signature matching types (<class 'numpy.dtypes.DateTime64DType'>, <class 'numpy.dtypes.StrDType'>) -> None```