We have tried it many different ways, but the upgrade of Confluence from 7.15 to 7.19 or 7.20 fails due to missing table.
caused by: java.lang.RuntimeException: Could not read fields for table AO_ED669C_IDP_CONFIG
at net.java.ao.schema.helper.DatabaseMetaDataReaderImpl.getFields(DatabaseMetaDataReaderImpl.java:141)
caused by: java.sql.SQLSyntaxErrorException: Table 'confluence.AO_ED669C_IDP_CONFIG' doesn't exist
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)