[ovirt-users] Gluster deploy error!

Hello! I have tried to deploy single node vith gluster, but if select "Compression and dedublication" I get an error: TASK [gluster.infra/roles/backend_setup : Create thick logical volume] ********* failed: [host01********] (item={'vgname': 'gluster_vg_sda4', 'lvname': 'gluster_lv_engine', 'size': '1970G'}) => {"ansible_index_var": "index", "ansible_loop_var": "item", "changed": false, "err": " Volume group \"gluster_vg_sda4\" has insufficient free space (504319 extents): 504320 required.\n", "index": 0, "item": {"lvname": "gluster_lv_engine", "size": "1970G", "vgname": "gluster_vg_sda4"}, "msg": "Creating logical volume 'gluster_lv_engine' failed", "rc": 5}