You might want to use code blocks when posting long lines.
The solution column is 256 characters (+1 for terminator)
`solution` varchar(257) NOT NULL,
>>> len(" 00000001d219003dfd0ec774541ac59c6b566c2b11a64e99d745a2e70028f3e100000000fc415a3 869208702e88db306d9473f116b0412fd76739780b29953fea82d83d24e11de451c00824f8c5b32 da00000000000000000000000000000000000000000000000000000000000000000000000000000 0000000000000000000")
260
Copying directly from the forums adds 4 whitespaces.
>>> len("00000001d219003dfd0ec774541ac59c6b566c2b11a64e99d745a2e70028f3e100000000fc415a3869208702e88db306d9473f116b0412fd76739780b29953fea82d83d24e11de451c00824f8c5b32da000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
256
Minor nitpick >_<
00000001d219003dfd0ec774541ac59c6b566c2b11a64e99d745a2e70028f3e100000000fc415a3869208702e88db306d9473f116b0412fd76739780b29953fea82d83d24e11de451c00824f8c5b32da000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000