Core Data; Cocoa error 134100

This is my first time with core data, and I am getting the following error.

I would really appreciate it if you could tell me how to fix it.

Unresolved error Error Domain=NSCocoaErrorDomain Code=134100 "The operation couldn’t be completed. (Cocoa error 134100.)" UserInfo=0x5927880 {metadata=<CFBasicHash 0x59269a0 [0x1007400]>{type = immutable dict, count = 7,
entries =>
    2 : <CFString 0x5926e10 [0x1007400]>{contents = "NSStoreModelVersionIdentifiers"} = <CFArray 0x5927240 [0x1007400]>{type = immutable, count = 0, values = ()}
    4 : <CFString 0x5927190 [0x1007400]>{contents = "NSPersistenceFrameworkVersion"} = <CFNumber 0x5926ca0 [0x1007400]>{value = +320, type = kCFNumberSInt64Type}
    6 : <CFString 0x59271c0 [0x1007400]>{contents = "NSStoreModelVersionHashes"} = <CFBasicHash 0x5927340 [0x1007400]>{type = immutable dict, count = 2,
entries =>
    0 : <CFString 0x5927280 [0x1007400]>{contents = "Details"} = <CFData 0x59272f0 [0x1007400]>{length = 32, capacity = 32, bytes = 0x434e180241ecf461e59580e640ff926b ... aa456d1410ed9d1b}
    2 : <CFString 0x5927260 [0x1007400]>{contents = "History"} = <CFData 0x59272a0 [0x1007400]>{length = 32, capacity = 32, bytes = 0x3437f77a5563363f66b9d72ea76e0ff1 ... be194eb9dd17cddc}
}

    7 : <CFString 0xe238b0 [0x1007400]>{contents = "NSStoreUUID"} = <CFString 0x5926fc0 [0x1007400]>{contents = "6C5FECCB-0B64-46EB-809B-E0A4577D1E90"}
    8 : <CFString 0xe23720 [0x1007400]>{contents = "NSStoreType"} = <CFString 0xe238f0 [0x1007400]>{contents = "SQLite"}
    9 : <CFString 0x59271f0 [0x1007400]>{contents = "NSStoreModelVersionHashesVersion"} = <CFNumber 0x4d13e20 [0x1007400]>{value = +3, type = kCFNumberSInt32Type}
    10 : <CFString 0x5927220 [0x1007400]>{contents = "_NSAutoVacuumLevel"} = <CFString 0x5927380 [0x1007400]>{contents = "2"}
}
, reason=The model used to open the store is in