Please try below steps:
1. Firstly reboot View and vCenter servers as suggested in below KB.
VMware KB: Recommended restart cycle of the VMware Horizon View environment
2. If the issue persists, Connect to Composer DB using management studio and run the below script against Composer DB.
DELETE
FROM [dbo].SVI_TASK_STATE
WHERE SIM_CLONE_ID = (SELECT ID FROM [dbo].SVI_SIM_CLONE WHERE VM_NAME like 'vmkp005')
DELETE
FROM [dbo].SVI_SC_PDISK_INFO
WHERE PARENT_ID = (SELECT ID FROM [dbo].SVI_SIM_CLONE WHERE VM_NAME like 'vmkp005')
DELETE
FROM [dbo].SVI_SC_BASE_DISK_KEYS
WHERE PARENT_ID = (SELECT ID FROM [dbo].SVI_SIM_CLONE WHERE VM_NAME like 'vmkp005')
DELETE
FROM [dbo].SVI_SIM_CLONE
WHERE VM_NAME = 'vmkp005'
DELETE
FROM [dbo].SVI_COMPUTER_NAME
WHERE NAME = 'vmkp005'
DELETE
FROM [dbo].SVI_VM_NAME
WHERE NAME = 'vmkp005'