Ignoring exception in command tip
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
    context)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/default.py", line 507, in do_execute
    cursor.execute(statement, parameters)
sqlite3.IntegrityError: UNIQUE constraint failed: transactions.paymentid

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/discord/ext/commands/core.py", line 50, in wrapped
    ret = yield from coro(*args, **kwargs)
  File "bot.py", line 421, in tip
    await _tip(ctx, amount, None, None)
  File "bot.py", line 523, in _tip
    session.commit()
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/session.py", line 943, in commit
    self.transaction.commit()
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/session.py", line 467, in commit
    self._prepare_impl()
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/session.py", line 447, in _prepare_impl
    self.session.flush()
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/session.py", line 2243, in flush
    self._flush(objects)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/session.py", line 2369, in _flush
    transaction.rollback(_capture_exception=True)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/util/compat.py", line 187, in reraise
    raise value
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/session.py", line 2333, in _flush
    flush_context.execute()
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/unitofwork.py", line 391, in execute
    rec.execute(self)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/unitofwork.py", line 556, in execute
    uow
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/persistence.py", line 181, in save_obj
    mapper, table, insert)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/orm/persistence.py", line 866, in _emit_insert_statements
    execute(statement, params)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 948, in execute
    return meth(self, multiparams, params)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/sql/elements.py", line 269, in _execute_on_connection
    return connection._execute_clauseelement(self, multiparams, params)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 1060, in _execute_clauseelement
    compiled_sql, distilled_params
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 1200, in _execute_context
    context)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 1413, in _handle_dbapi_exception
    exc_info
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/util/compat.py", line 186, in reraise
    raise value.with_traceback(tb)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
    context)
  File "/usr/local/lib/python3.5/dist-packages/sqlalchemy/engine/default.py", line 507, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) UNIQUE constraint failed: transactions.paymentid [SQL: '
INSERT INTO transactions (tx, amount, paymentid) VALUES (?, ?, ?)'] [parameters: ('02cea0623b02e964c39afb735fc3c
74c8761b0a9dc02b2a740aceee22f3de5a0', 1000010, '71c72fb7f8cad0a49db25c0d2aa4abd519492ac50c71c9d03bc097bb2062f14c
')] (Background on this error at: http://sqlalche.me/e/gkpj)
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/discord/ext/commands/bot.py", line 846, in process_commands
    yield from command.invoke(ctx)
  File "/usr/local/lib/python3.5/dist-packages/discord/ext/commands/core.py", line 374, in invoke
    yield from injected(*ctx.args, **ctx.kwargs)
  File "/usr/local/lib/python3.5/dist-packages/discord/ext/commands/core.py", line 54, in wrapped
    raise CommandInvokeError(e) from e
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: IntegrityError: (sqlite3.IntegrityE
rror) UNIQUE constraint failed: transactions.paymentid [SQL: 'INSERT INTO transactions (tx, amount, paymentid) V
ALUES (?, ?, ?)'] [parameters: ('02cea0623b02e964c39afb735fc3c74c8761b0a9dc02b2a740aceee22f3de5a0', 1000010, '71
c72fb7f8cad0a49db25c0d2aa4abd519492ac50c71c9d03bc097bb2062f14c')] (Background on this error at: http://sqlalche.
me/e/gkpj)