Contradiction with Exodus 28:4
Exodus 28:4 describes garments for the priests including a mitre, but does not mention a blue lace, unlike Exodus 39:31 which specifically mentions putting a blue lace on the mitre.
Exodus 28:4: And these [are] the garments which they shall make; a breastplate, and an ephod, and a robe, and a broidered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest's office.
Contradiction with Exodus 36:2
Discusses the artisans' abilities to perform all the work commanded by the Lord without mentioning any specific items like the blue lace on the mitre stated in Exodus 39:31.
Exodus 36:2: And Moses called Bezaleel and Aholiab, and every wise hearted man, in whose heart the LORD had put wisdom, [even] every one whose heart stirred him up to come unto the work to do it:
Contradiction with Leviticus 8:9
Although Leviticus 8:9 describes the placement of the holy crown on Aaron's head, it does not mention the use of blue lace as specified in Exodus 39:31.
Leviticus 8:9: And he put the mitre upon his head; also upon the mitre, [even] upon his forefront, did he put the golden plate, the holy crown; as the LORD commanded Moses.
Contradiction with Numbers 15:38
Numbers 15:38 advises putting a fringe of blue on the borders of garments, focusing on all the people of Israel rather than the priests' attire as in Exodus 39:31.
Numbers 15:38: Speak unto the children of Israel, and bid them that they make them fringes in the borders of their garments throughout their generations, and that they put upon the fringe of the borders a ribband of blue:
Contradiction with Ezekiel 44:18
States that priests should not gird themselves with any garment that causes sweat, focusing on practicality and purity rather than specific decorative elements like the blue lace described in Exodus 39:31.
Ezekiel 44:18: They shall have linen bonnets upon their heads, and shall have linen breeches upon their loins; they shall not gird [themselves] with any thing that causeth sweat. [with...: or, in sweating places: Heb. in, or, with sweat]