Revert "fix missing migration snippet: remove old legend"
Revert "fix missing migration snippet: remove old legend"

This reverts commit b3c8482cac2c5240239380cc771f2ab21fea0353.

davidbgk/udata,davidbgk/udata,etalab/udata,etalab/udata,etalab/udata,opendatateam/udata,opendatateam/udata,davidbgk/udata,opendatateam/udata