bitcoin/doc/release-notes-15454.md

Wallet
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Bitcoin Core will no longer create an unnamed `""` wallet by default when no wallet is specified on the command line or in the configuration files.
For backwards compatibility, if an unnamed `""` wallet already exists and would have been loaded previously, then it will still be loaded.
Users without an unnamed `""` wallet and without any other wallets to be loaded on startup  will be prompted to either choose a wallet to load, or to create a new wallet.
Do not create default wallet No longer create a default wallet. The default wallet will still be loaded if it exists and not other wallets were specified (anywhere, including settings.json, bitcoin.conf, and command line). Tests are updated to be started with -wallet= if they need the default wallet. Added test to wallet_startup.py testing that no default wallet is created and that it is loaded if it exists and no other wallets were specified. 2020-06-22 17:58:18 -04:00			`Wallet`
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			Bitcoin Core will no longer create an unnamed `""` wallet by default when no wallet is specified on the command line or in the configuration files.
			For backwards compatibility, if an unnamed `""` wallet already exists and would have been loaded previously, then it will still be loaded.
			Users without an unnamed `""` wallet and without any other wallets to be loaded on startup will be prompted to either choose a wallet to load, or to create a new wallet.