Central midfielder Bobby Johnson joined the Celts in June 2022, following a four-year spell with Alfreton Town.
Johnson joined Alfreton in 2018, and has spent the past few seasons as a key figure in Billy Heath’s National League North side.
The 28-year-old came through the ranks at Retford United, before spending time at Frickley Athletic, Goole and North Ferriby United.