Pieces (from left to right):
Piece: 1 (# 1)
Piece: 2 (#1024)
Piece: 3 (# 928)
Piece: 4 (# 975)
Piece: 5 (# 888)
Piece: 6 (# 943)
Found "1" way to assemble the pieces 1, 2, 3, 4, 5, 6; which cannot be taken apart.
Note, that the only piece which can be removed is the solid piece (piece #1).
The others cannot be taken apart.