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I'm looking though the blockchain, and I've found 2 transactions in different blocks, which have the same hash:

block 91812:

    "result": {
        "hash": "00000000000af0aed4792b1acee3d966af36cf5def14935db8de83d6f9306f2f",
        "confirmations": 545294,
        "strippedsize": 616,
        "size": 616,
        "weight": 2464,
        "height": 91812,
        "version": 1,
        "versionHex": "00000001",
        "merkleroot": "49991d7653bec6efebee7d11f27ca2dffcc35ebe95ee5eebd602916b2f2fa665",
        "tx": [
            {
                "txid": "d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599",
                "hash": "d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599",
                "version": 1,
                "size": 133,
                "vsize": 133,
                "weight": 532,
                "locktime": 0,
                "vin": [
                    {
                        "coinbase": "0456720e1b00",
                        "sequence": 4294967295
                    }
                ],
                "vout": [
                    {
                        "value": 50.00000000,
                        "n": 0,
                        "scriptPubKey": {
                            "asm": "046896ecfc449cb8560594eb7f413f199deb9b4e5d947a142e7dc7d2de0b811b8e204833ea2a2fd9d4c7b153a8ca7661d0a0b7fc981df1f42f55d64b26b3da1e9c OP_CHECKSIG",
                            "hex": "41046896ecfc449cb8560594eb7f413f199deb9b4e5d947a142e7dc7d2de0b811b8e204833ea2a2fd9d4c7b153a8ca7661d0a0b7fc981df1f42f55d64b26b3da1e9cac",
                            "type": "pubkey"
                        }
                    }
                ],
                "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff060456720e1b00ffffffff0100f2052a010000004341046896ecfc449cb8560594eb7f413f199deb9b4e5d947a142e7dc7d2de0b811b8e204833ea2a2fd9d4c7b153a8ca7661d0a0b7fc981df1f42f55d64b26b3da1e9cac00000000"
            },
            {
                "txid": "777ed67c58761dcaf3762e64576591c8d39317bcbebf0cb335e138d6ea438ce2",
                "hash": "777ed67c58761dcaf3762e64576591c8d39317bcbebf0cb335e138d6ea438ce2",
                "version": 1,
                "size": 402,
                "vsize": 402,
                "weight": 1608,
                "locktime": 0,
                "vin": [
                    {
                        "txid": "f98b11a5f11d08c3ac31c465092bb5d4c09bd2c815fa23959d654ef9b91414f1",
                        "vout": 0,
                        "scriptSig": {
                            "asm": "3044022068b2a587ec9374325c17c79f9102358fdd0574eeb3bebea08affab3e07afd93c0220248ac15de4e2b6391ff12c348ba6cc024448dba20611a40a35f8b67b6f966cd5[ALL] 046d337916441e20c469623303b47fd0c23326956a183e3274801f1a863e04b7f1dc2bee3388292571955955f8a24445ae35781dd9e39e8472bff623d3375f490e",
                            "hex": "473044022068b2a587ec9374325c17c79f9102358fdd0574eeb3bebea08affab3e07afd93c0220248ac15de4e2b6391ff12c348ba6cc024448dba20611a40a35f8b67b6f966cd50141046d337916441e20c469623303b47fd0c23326956a183e3274801f1a863e04b7f1dc2bee3388292571955955f8a24445ae35781dd9e39e8472bff623d3375f490e"
                        },
                        "sequence": 4294967295
                    },
                    {
                        "txid": "0c4d26699fbd1dd2ecc564ee3f02afd2e5f1837e03044fffa838b1283a2f7cb3",
                        "vout": 0,
                        "scriptSig": {
                            "asm": "304402206ccc7e10f33ed2e73c000780e972c479cf0a74d4a5825d74eebb8ec87d31da3202207a945ff0062c9df5d7a9c51483f0d8fc9d0cad1670319c8fbebde2198f8eea22[ALL] 0450a6524d0f7519571e8fb761ac8285f88c5ad9976454ee2148db5e0d13caa534f6bc56678a328dab8319fd62feabc977e478776c9cf0e705575be61dccdf8383",
                            "hex": "47304402206ccc7e10f33ed2e73c000780e972c479cf0a74d4a5825d74eebb8ec87d31da3202207a945ff0062c9df5d7a9c51483f0d8fc9d0cad1670319c8fbebde2198f8eea2201410450a6524d0f7519571e8fb761ac8285f88c5ad9976454ee2148db5e0d13caa534f6bc56678a328dab8319fd62feabc977e478776c9cf0e705575be61dccdf8383"
                        },
                        "sequence": 4294967295
                    }
                ],
                "vout": [
                    {
                        "value": 20.00000000,
                        "n": 0,
                        "scriptPubKey": {
                            "asm": "OP_DUP OP_HASH160 dda4521a9cd99e92323ae4762467dab928b65f45 OP_EQUALVERIFY OP_CHECKSIG",
                            "hex": "76a914dda4521a9cd99e92323ae4762467dab928b65f4588ac",
                            "reqSigs": 1,
                            "type": "pubkeyhash",
                            "addresses": [
                                "1MCwBbhNGp5hRm5rC1Aims2YFRe2SXPYKt"
                            ]
                        }
                    }
                ],
                "hex": "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"
            }
        ],
        "time": 1289757588,
        "mediantime": 1289756309,
        "nonce": 1166692788,
        "bits": "1b0e7256",
        "difficulty": 4536.353723275037,
        "chainwork": "00000000000000000000000000000000000000000000000001b349c8e6a815b0",
        "nTx": 2,
        "previousblockhash": "000000000002afe839294d4e038b5c831bc09632fd717c0980f8f216dc2b360f",
        "nextblockhash": "0000000000006626b8604240c5bb5305830e67fcfa8bae10d64cea0e2eb121d4"
    },
    "error": null,
    "id": "183626"
}

and block 91842

{
    "result": {
        "hash": "00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec",
        "confirmations": 545263,
        "strippedsize": 214,
        "size": 214,
        "weight": 856,
        "height": 91842,
        "version": 1,
        "versionHex": "00000001",
        "merkleroot": "d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599",
        "tx": [
            {
                "txid": "d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599",
                "hash": "d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599",
                "version": 1,
                "size": 133,
                "vsize": 133,
                "weight": 532,
                "locktime": 0,
                "vin": [
                    {
                        "coinbase": "0456720e1b00",
                        "sequence": 4294967295
                    }
                ],
                "vout": [
                    {
                        "value": 50.00000000,
                        "n": 0,
                        "scriptPubKey": {
                            "asm": "046896ecfc449cb8560594eb7f413f199deb9b4e5d947a142e7dc7d2de0b811b8e204833ea2a2fd9d4c7b153a8ca7661d0a0b7fc981df1f42f55d64b26b3da1e9c OP_CHECKSIG",
                            "hex": "41046896ecfc449cb8560594eb7f413f199deb9b4e5d947a142e7dc7d2de0b811b8e204833ea2a2fd9d4c7b153a8ca7661d0a0b7fc981df1f42f55d64b26b3da1e9cac",
                            "type": "pubkey"
                        }
                    }
                ],
                "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff060456720e1b00ffffffff0100f2052a010000004341046896ecfc449cb8560594eb7f413f199deb9b4e5d947a142e7dc7d2de0b811b8e204833ea2a2fd9d4c7b153a8ca7661d0a0b7fc981df1f42f55d64b26b3da1e9cac00000000"
            }
        ],
        "time": 1289768691,
        "mediantime": 1289767893,
        "nonce": 3778549762,
        "bits": "1b0e7256",
        "difficulty": 4536.353723275037,
        "chainwork": "00000000000000000000000000000000000000000000000001b55d6596dd0790",
        "nTx": 1,
        "previousblockhash": "00000000000a1e92acbcbdf594cac25d1095544d5fbf5113bfec85a9eb4b1120",
        "nextblockhash": "0000000000016ca756e810d44aee6be7eabad75d2209d7f4542d1fd53bafc984"
    },
    "error": null,
    "id": "183686"
}

Both have coinbase transactions, which spend to d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599-0. Also, first transaction output is not spent by the time second transaction is added to blockchain.

What does this mean? If d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599-0 is ever one of the inputs, how much bitcoin does it contain? 50 or 100?

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