Follow the steps:

1. Remove the (local-lvm)

2. Go to Shell

3. Run command:

lvremove /dev/pve/data -y; \
lvresize -l +100%FREE /dev/pve/root; \
resize2fs /dev/mapper/pve-root

4. Go to local volume & edit

5. Select Hilighted options & ok

Restart Proxmox host system.