I did a firedrake-update - which worked fine then a firedrake-clean but dmplex seems to throw an error

Traceback (most recent call last):
  File "/home/lcs/Programs/firedrake/bin/firedrake-clean", line 3, in <module>
    from firedrake.tsfc_interface import clear_cache, TSFCKernel
  File "/home/lcs/Programs/firedrake/src/firedrake/firedrake/__init__.py", line 29, in <module>
    from firedrake.assemble import *
  File "/home/lcs/Programs/firedrake/src/firedrake/firedrake/assemble.py", line 10, in <module>
    from firedrake import assemble_expressions
  File "/home/lcs/Programs/firedrake/src/firedrake/firedrake/assemble_expressions.py", line 18, in <module>
    from firedrake import function
  File "/home/lcs/Programs/firedrake/src/firedrake/firedrake/function.py", line 10, in <module>
    from firedrake import functionspaceimpl
  File "/home/lcs/Programs/firedrake/src/firedrake/firedrake/functionspaceimpl.py", line 16, in <module>
    from firedrake.functionspacedata import get_shared_data
  File "/home/lcs/Programs/firedrake/src/firedrake/firedrake/functionspacedata.py", line 30, in <module>
    from firedrake import dmplex as dm_mod
ImportError: cannot import name dmplex