renumbering

verb

1. (form-of, gerund, participle, present)present participle and gerund of renumber

noun

1. The act or process of assigning new numbers.

   “frequent renumberings”

   “L.M.S. Numbers, Names and Classes; L.N.E.R. Second Renumberings; Stock Changes L.N.E.R., G.W.R., S.R. July, 1946. By A. J. Cresswell. […] The first three pages of this booklet consist of tables of second renumberings of L.N.E.R. locomotives where they differ from the new numbers selected in the original scheme and recorded in booklet No. Q 64 of this series.”