Trying to merge 10 releases into one yields merge strategy not applicable.
8 releases have 1 disc, and 2 releases have 2 discs, thus the merge editor starts with 8 position 1s and 2 position 2s.

All discs are given their correct position number and disc titles. Without adding disc titles, the same error appears.

http://musicbrainz.org/release/068634ea-8ee1-315d-84a7-85f306db7ed3
http://musicbrainz.org/release/9e39700b-705a-3b6a-9a68-a8f0ff91e0a2
http://musicbrainz.org/release/5341cf13-ca84-33d2-b47b-477ece03cd3d
http://musicbrainz.org/release/cc5e02ff-7716-36c5-8ff6-79aca71c6395
http://musicbrainz.org/release/7ba78608-e191-3a45-8797-baa54d058781
http://musicbrainz.org/release/ef123edb-2b1c-36ac-97f9-ca48a2cdf9a7
http://musicbrainz.org/release/af007091-24c0-370b-a7c4-6d1a0e108925
http://musicbrainz.org/release/75d88f01-71c8-3164-b5df-6e6ae881eeeb
http://musicbrainz.org/release/9030b5e8-522f-3dbe-9346-276c2c854466
http://musicbrainz.org/release/27630adb-6510-390f-a9b3-8e4c1315e64b