17 def upgrade_15(old):  argument
18   new = copy.deepcopy(old)
24 def upgrade_16(old):  argument
25   new = copy.deepcopy(old)
27   new["nextId"] = max(old["nextId"], old["nextNoteId"], old["nextAreaId"])
28   engines = old["engines"]
34 def upgrade_17(old):  argument
35   new = copy.deepcopy(old)
41 def upgrade_18(old):  argument
42   new = copy.deepcopy(old)
48 def upgrade_19(old):  argument
49   new = copy.deepcopy(old)
55 def upgrade_20(old):  argument
56   new = copy.deepcopy(old)
62 def upgrade_20(old):  argument
63   new = copy.deepcopy(old)
69 def upgrade_21(old):  argument
70   new = copy.deepcopy(old)
76 def upgrade_22(old):  argument
77   new = copy.deepcopy(old)
85 def upgrade_23(old):  argument
86   new = copy.deepcopy(old)
96 def upgrade_24(old):  argument
97   new = copy.deepcopy(old)
104 def upgrade_25(old):  argument
105   new = copy.deepcopy(old)
111 def upgrade_26(old):  argument
112   new = copy.deepcopy(old)
118 def upgrade_27(old):  argument
119   new = copy.deepcopy(old)