  --> [ local path prefix ]/tlm_packets/duplicate_id_explicit.fpp:12:12
   |
12 |     packet P2 id 0 group 1 {
   |            ^^ duplicate identifier value (0 dec, 0 hex)
   |
  ::: [ local path prefix ]/tlm_packets/duplicate_id_explicit.fpp:8:12
   |
 8 |     packet P1 id 0 group 0 {
   |            -- previous occurrence is here

