Ceph - Why are Placement Groups(PGs) remapped to OSD id 2147483647

Issue

• Ceph - Placement Groups(PGs) remapped to nonexistent OSD
• Why PGs are mapped to OSD id 2147483647

# ceph pg 39.e5 query

[.......]

{
    "state": "active+undersized+degraded+remapped",
    "snap_trimq": "[]",
    "epoch": 826,
    "up": [],
    "acting": [
        45,
        2147483647,
        35,
        18,
        103,
        113
    ],