Group formation is a natural process that cannot be doubted. Please try to find out the reasons for such an occurrence by consulting the workers concerned informally. There may be several reasons for this, such as discrimination among workers for any cause, mishandling of workers by managerial personnel, or improper handling of grievances.
Please carefully examine the causes, and if any are found to be incorrect, try to address them. This approach will cultivate loyalty among the workers towards you. If you find some workers to be troublesome, consider befriending them and managing their behavior. Finally, seek assistance from your other colleagues, disband the group by transferring some to other departments, moving others to different positions, and developing friendships with others.
Please remember, there is no one-size-fits-all solution for this issue. You need to foster loyalty among a group of workers to form a cohesive team that can also address any dissenting individuals.
All the best.
Regards,
S.K. Johri