Stateful duplication / Finalization issue

[Mr-Leshiy]

On the current network have found an issue with the block 10815 height 7252f9f7a1b973854726de0d861541d4545f468b7757f8683603000000000000 hash.
This block has a duplicated pop data:

2021-11-03T17:36:00Z [alt-cpp] [debug] connectBlock: block: ALTBlockIndex(height=10815,
hash=7252f9f7a1b973854726de0d861541d4545f468b7757f8683603000000000000, next=1, status=258,
 header=AltBlock{height=10815, hash=7252f9f7a1b973854726de0d861541d4545f468b7757f8683603000000000000},
  ATVs=41[0613e3fb9cb816b608c34c06cf22dd3341b38ce42d45c16e77354d1f17e93773,86761d9f627cfe5e71184f63949883db76b6a3e8b6c6312ff2d6f90058d31885,45779520a614f045ff0d8ff0939b7db8b2477067c52ec366b6f2460e4b5ee0f7,9e4f5a7d94e3a15856fdc080813e5a47e0a5acaf0b1ed2ec8aad04e19fc8a504,704244b31130c30edfeb0bf4489b65e627187141b6aa6fd17840bb786f948008,cf9e0c4bfe03d14f8ef8195a3b0cd4ca6cbfb58ed49a1e0a94e338df16ba983d,0196691ca19e326f6353f5c078b44d7ad8f48d700a73d2c0fe1f91a1f86733b6,08ef22c471b9aa870cd0148ea6da43b7c5456a065ba76792fc112b69cec082e6,ad5fc82ba7ecad8daa4ac36c7c4dda8f4a7f501eddfe5e89ac8863ef358bfe41,253d1cf610f77a9965e4cb1796b1a21fd20a4b9d85b52a7e2391dddd69f0d6d8,9d46728137bc12fae5881ec8f99936ca0004242f35364e7e3eb9e41be71cb69a,f0a2c2338ce609cf3b74eb0a67fddd147383f98fb38810f2e1331cd4ee728746,3caa4b22976178ae151a18959a433bf19c72025d7dfcbb5849daca39604c33eb,31373d5033fa7f0eb0fd08fec3272df84eb68c36c795340a52b7b067ae4376f9,8f24aba38f93eefb15056f027de52573013666eeecf3147796d5c43e98811155,cd567b9ba78c40f8901f19a07c2f153a32ac6bc3c68682e295a28cee66f3cc38,15c653f6b9e558f1d9ceabb8e535a55161636393d1f84347b70e935d9389219b,d506479bac454734f81324019b323751ce53a936cab444400205a75df765dc7c,530c0c3731063646ea4d126409262fde5afa055a7386591e6541e1737b118c53,ea75b96532f7a55267954397c4efc8a4ac78ce810ab4ee364d42b7e9962f65d6,6e41ced366e46022305fc0b3e970c973c7e395cb15e1bae63b0d6ea34cf85c6d,38f029c87baf57893d0e5662852e1dca307d98416ffeed1927d6343e4791d1c2,324b25cf5af60d01cba78ebdb2174441f6c3104960d2fdeff2172aca09bc8e70,cfe2ad0cb6508384f9f773935913eb720c3f8814ea2968296dbf50555f9cbdc1,cca02478e06c4732d079ecabdeebcdeaa213e7f440cef8fe26975843662e7d14,d487d0e7300104a9ac0c004600e3fc2bbfdaeacd25844c3d7020aaa91dced852,c5926700e662a0bc89a093ff33b54db6ce44ed21293a680a6489125e64f61e65,34de73c5debec3ab879135b34b6edfdb2ec84eda1d273f0939d840facc695bfa,acc9a576d4ee8efef69942b79c9c88a97cc2962d8124e1346f854a93be4ab760,64d31ce15f936b6cdab578b54987aea1f56fa36c7b46ac17f1d6c87dbffd47de,8ec1de4b828dcd87bf34b64101c19beebfd2b2c26de8be95b398fbe3085e2c05,f376c0ca1f3217c02a3006e5b1d197f4904d5707f3f6e6b3a5ff6f4aee1bd30a,5895098857c39edd6557c8f8deff08012bc5c8981416fd096fec7fbcaad649d8,77315df9233cbbeeaffe0989408f13fee325b3671adec3232de0318fdad5e614,13296a927d55804150dea102544ff36d6df19d8acdf06d6216549c289dd630e1,4c62d070e8936b427749c2331748b8563fb17125e8632690f8d5fd5e8c24c13a,f40940c2b9fcbf70b8cbdc38d19ca4d7e1c0bd09b20fc8756e73890e0a5f07e3,0d5ad9770e04e74314bf8ef97fed71fc50c4d65c81c80c4064e52cc88d036639,6cb59c93cc44f11365064b6ea77ebe38e404e37fb42ec13a4ed7c7661903bd5a,fd534e6888083769e8a33554cd4b3d9683b3137e427d9cf412f2895fea0cf218,ae82d243324e91e4a052afa78b1cafd8a319e3901dcf9b57ffa4d8e693fd8ae1], VTBs=0[], VBKs=3[2d55f19fcf264355c597e708,87b93a1c35707e95ba32a2bd,cd82193e5f106d47e890b18c]) has stateful duplicate, state: VBK-duplicate, Payload VBK:2d55f19fcf264355c597e708 in block ALTBlockIndex(height=10815, hash=7252f9f7a1b973854726de0d861541d4545f468b7757f8683603000000000000, next=1, status=258,
   header=AltBlock{height=10815, hash=7252f9f7a1b973854726de0d861541d4545f468b7757f8683603000000000000}, ATVs=41[0613e3fb9cb816b608c34c06cf22dd3341b38ce42d45c16e77354d1f17e93773,86761d9f627cfe5e71184f63949883db76b6a3e8b6c6312ff2d6f90058d31885,45779520a614f045ff0d8ff0939b7db8b2477067c52ec366b6f2460e4b5ee0f7,9e4f5a7d94e3a15856fdc080813e5a47e0a5acaf0b1ed2ec8aad04e19fc8a504,704244b31130c30edfeb0bf4489b65e627187141b6aa6fd17840bb786f948008,cf9e0c4bfe03d14f8ef8195a3b0cd4ca6cbfb58ed49a1e0a94e338df16ba983d,0196691ca19e326f6353f5c078b44d7ad8f48d700a73d2c0fe1f91a1f86733b6,08ef22c471b9aa870cd0148ea6da43b7c5456a065ba76792fc112b69cec082e6,ad5fc82ba7ecad8daa4ac36c7c4dda8f4a7f501eddfe5e89ac8863ef358bfe41,253d1cf610f77a9965e4cb1796b1a21fd20a4b9d85b52a7e2391dddd69f0d6d8,9d46728137bc12fae5881ec8f99936ca0004242f35364e7e3eb9e41be71cb69a,f0a2c2338ce609cf3b74eb0a67fddd147383f98fb38810f2e1331cd4ee728746,3caa4b22976178ae151a18959a433bf19c72025d7dfcbb5849daca39604c33eb,31373d5033fa7f0eb0fd08fec3272df84eb68c36c795340a52b7b067ae4376f9,8f24aba38f93eefb15056f027de52573013666eeecf3147796d5c43e98811155,cd567b9ba78c40f8901f19a07c2f153a32ac6bc3c68682e295a28cee66f3cc38,15c653f6b9e558f1d9ceabb8e535a55161636393d1f84347b70e935d9389219b,d506479bac454734f81324019b323751ce53a936cab444400205a75df765dc7c,530c0c3731063646ea4d126409262fde5afa055a7386591e6541e1737b118c53,ea75b96532f7a55267954397c4efc8a4ac78ce810ab4ee364d42b7e9962f65d6,6e41ced366e46022305fc0b3e970c973c7e395cb15e1bae63b0d6ea34cf85c6d,38f029c87baf57893d0e5662852e1dca307d98416ffeed1927d6343e4791d1c2,324b25cf5af60d01cba78ebdb2174441f6c3104960d2fdeff2172aca09bc8e70,cfe2ad0cb6508384f9f773935913eb720c3f8814ea2968296dbf50555f9cbdc1,cca02478e06c4732d079ecabdeebcdeaa213e7f440cef8fe26975843662e7d14,d487d0e7300104a9ac0c004600e3fc2bbfdaeacd25844c3d7020aaa91dced852,c5926700e662a0bc89a093ff33b54db6ce44ed21293a680a6489125e64f61e65,34de73c5debec3ab879135b34b6edfdb2ec84eda1d273f0939d840facc695bfa,acc9a576d4ee8efef69942b79c9c88a97cc2962d8124e1346f854a93be4ab760,64d31ce15f936b6cdab578b54987aea1f56fa36c7b46ac17f1d6c87dbffd47de,8ec1de4b828dcd87bf34b64101c19beebfd2b2c26de8be95b398fbe3085e2c05,f376c0ca1f3217c02a3006e5b1d197f4904d5707f3f6e6b3a5ff6f4aee1bd30a,5895098857c39edd6557c8f8deff08012bc5c8981416fd096fec7fbcaad649d8,77315df9233cbbeeaffe0989408f13fee325b3671adec3232de0318fdad5e614,13296a927d55804150dea102544ff36d6df19d8acdf06d6216549c289dd630e1,4c62d070e8936b427749c2331748b8563fb17125e8632690f8d5fd5e8c24c13a,f40940c2b9fcbf70b8cbdc38d19ca4d7e1c0bd09b20fc8756e73890e0a5f07e3,0d5ad9770e04e74314bf8ef97fed71fc50c4d65c81c80c4064e52cc88d036639,6cb59c93cc44f11365064b6ea77ebe38e404e37fb42ec13a4ed7c7661903bd5a,fd534e6888083769e8a33554cd4b3d9683b3137e427d9cf412f2895fea0cf218,ae82d243324e91e4a052afa78b1cafd8a319e3901dcf9b57ffa4d8e693fd8ae1], VTBs=0[], VBKs=3[2d55f19fcf264355c597e708,87b93a1c35707e95ba32a2bd,cd82193e5f106d47e890b18c]) is a stateful duplicate
2021-11-03T17:36:00Z [alt-cpp] [debug] invalidateSubtree: Invalidating ALT subtree: reason=64 block=ALT:10815:7252f9f7a1b973854726de0d861541d4545f468b7757f8683603000000000000

The main issue with that current network splits into two one, who rejects this block and who accepts this block (on the same node versions) which leads to the network state inconsistency.