How do I find out, what makes GMP_jll v6.2.0+0 downgrade to v6.1.2+5

How do I find out, what makes GMP v6.2.0+0 downgrade to v6.1.2+5

(@v1.4) pkg> up
   Updating registry at `~/.julia/registries/General`
   Updating git-repo ``
   Updating git-repo ``
   Updating git-repo ``
  Installed FillArrays ─ v0.8.11
  Installed Clustering ─ v0.14.1
   Updating `~/.julia/environments/v1.4/Project.toml`
  [4076af6c] ↑ JuMP v0.21.2 ⇒ v0.21.3
   Updating `~/.julia/environments/v1.4/Manifest.toml`
  [aaaa29a8] ↑ Clustering v0.13.4 ⇒ v0.14.1
  [1a297f60] ↑ FillArrays v0.8.10 ⇒ v0.8.11
  [781609d7] ↓ GMP_jll v6.2.0+0 ⇒ v6.1.2+5
  [4076af6c] ↑ JuMP v0.21.2 ⇒ v0.21.3
  [94ce4f54] ↑ Libiconv_jll v1.16.0+2 ⇒ v1.16.0+3
  [d8a4904e] ↑ MutableArithmetics v0.2.9 ⇒ v0.2.10
  [458c3c95] ↑ OpenSSL_jll v1.1.1+2 ⇒ v1.1.1+3
  [5d786b92] ↑ TerminalLoggers v0.1.1 ⇒ v0.1.2
  [02c8fc9c] ↑ XML2_jll v2.9.9+4 ⇒ v2.9.9+5
  [83775a58] ↑ Zlib_jll v1.2.11+10 ⇒ v1.2.11+11

My attempt to find out

(@v1.4) pkg> add GMP_jll@6.2.0
  Resolving package versions...
ERROR: Unsatisfiable requirements detected for package GMP_jll [781609d7]:
 GMP_jll [781609d7] log:
 ├─possible versions are: [6.1.2, 6.2.0] or uninstalled
 ├─restricted to versions 6.2.0 by an explicit requirement, leaving only versions 6.2.0
 └─restricted by julia compatibility requirements to versions: 6.1.2 or uninstalled — no versions left

See and the network of related issues.

tl;dr: GMP 6.2 broke everything on Julia < 1.5.

Thank you for your reply. I thought one of the packages broke it but your solution said it causes problem for current Julia versions.