fixed df ambiguity error when loading conc lines
fixed df ambiguity error when loading conc lines


Former-commit-id: cf1138732bc1c11ca60e5ab29da78d13973004f8 [formerly bfe1fb9ee5bb6b29dc640790eca37b5cdb8aded4]
Former-commit-id: 98f60bade2cf38fee432fc3e5606ea172c867c66
SigridK/corpkit,SigridK/corpkit