Contradiction with Hebrews 10:1
This verse speaks of the Law having only a shadow of good things to come, suggesting that Old Testament directives, like those concerning the Tabernacle, are not the full reality, whereas Exodus 37:18 describes the meticulous construction of the lampstand as a significant and concrete aspect of the Tabernacle.
Hebrews 10:1: For the law having a shadow of good things to come, [and] not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.