Try the BUG - CSCsd31071
Workaround: For issue #2 (See Note below)
Issue #2 - Exiting Phone with existing Speed Dial BLF
1. Move the existing Speed Dial BLF to the "Unassigned Associated Items" list, save and close the popup.
2. Select the Speed Dial BLF link on the "Phone Configuration" page to modify it.
3. Move the Speed Dial BLF from the "Unassigned Associated Items" to "Associated Items", save and close the popup.
Note: If BLF Speed Dial is added in the "Destination" field instead of selecting Directory Number from "Directory Number" drop-down list on BLF Speed Dial page, after it is saved, this filed changes to "blank" which is incorrect (a new error). But this field was added. To add this destination, please follow above steps for the workaround to a destination value to BLF Speed Dial field.