The deal with Novus Solutions was due to run until the end of the 2019/20 season, but a change in management at the company means it has now come to an end.
A club statement said: "The club had previously agreed a five-year deal with the then Managing Director of Novus, Mark Brindley, which was due to run until the end of the 2019/20 season and the club had this confirmed by his replacement, Neil Hand last summer.
"However, with new management in place at Novus, the company have chosen not to carry on with the agreement.
"The ending of the agreement has left the club with a shortfall for this season, but the club does have contingency funds to cover this, which is thanks largely to this season’s brilliant Emirates FA Cup run.
"As with most deals at this level, the agreements are verbal, and we would like to place on record our thanks to Novus Solutions for their generous support and contributions to the club over the years."
Keep up-to-date with our exclusive email newsletters.
Subscribe