| ⇢ | A | CreateLedgerTable added |
| ⇢ | A | IncomeExpense::set_transaction_id() added | |
| ⇢ | A | CreateLedgerTable::up() added | |
| ⇢ | A | IncomeExpense::add_income() added | |
| ⇢ | A | IncomeExpense::add_expense() added | |
| ⇢ | A | IncomeExpense::add_transaction_on_ledger() added | |
| ⇢ | A | CreateLedgerTable::down() added | |
| A | ↘ | B | IncomeExpenseServiceProvider::boot() got worse |